【记录】尝试分析Buildroot在make menuconfig后make时的内部执行逻辑

【背景】

https://www.crifan.com/try_analysis_buildroot_after_make

折腾：

【已解决】Cygwin下为xscale编译BuildRoot时make出错：/bin/sh: -c: line 0: syntax error near unexpected token `(‘

期间，需要去分析Buildroot的make的逻辑。

对于Buildroot在make menuconfig后，（又去make clean了一下，然后）去make，此时的输出是：

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CLi@PC-CLI-1 ~ /develop/buildroot/buildroot-2013 .05 $  make /usr/bin/make -j4  HOSTCC= "/usr/bin/gcc" HOSTCXX= "/usr/bin/g++" silentoldconfig make [1]: Entering directory ` /home/CLi/develop/buildroot/buildroot-2013 .05' mkdir -p  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/lxdialog /usr/bin/make CC= "/usr/bin/gcc" HOSTCC= "/usr/bin/gcc" obj= /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config -C support /kconfig -f Makefile.br conf make [2]: Entering directory ` /home/CLi/develop/buildroot/buildroot-2013 .05 /support/kconfig ' /usr/bin/gcc -I /usr/include/ncursesw -DCURSES_LOC= "<ncursesw/curses.h>"  -DNCURSES_WIDECHAR=1 -DLOCALE -DKBUILD_NO_NLS -I /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config -DCONFIG_=\"\"  -MM *.c >  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/ .depend 2> /dev/null || : make [2]: Leaving directory ` /home/CLi/develop/buildroot/buildroot-2013 .05 /support/kconfig ' make [2]: Entering directory ` /home/CLi/develop/buildroot/buildroot-2013 .05 /support/kconfig ' /usr/bin/gcc -I /usr/include/ncursesw -DCURSES_LOC= "<ncursesw/curses.h>"  -DNCURSES_WIDECHAR=1 -DLOCALE -DKBUILD_NO_NLS -I /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config -DCONFIG_=\"\"   -c conf.c -o  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/conf .o /usr/bin/gcc -I /usr/include/ncursesw -DCURSES_LOC= "<ncursesw/curses.h>"  -DNCURSES_WIDECHAR=1 -DLOCALE -DKBUILD_NO_NLS -I /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config -DCONFIG_=\"\"  -I. -c  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/zconf .tab.c -o  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/zconf .tab.o In  file included from  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/zconf .tab.c:2500:0: . /confdata .c: In  function ‘conf_split_config’: . /confdata .c:849:6: warning: assignment makes pointer from integer without a cast [enabled by default] /usr/bin/gcc -I /usr/include/ncursesw -DCURSES_LOC= "<ncursesw/curses.h>"  -DNCURSES_WIDECHAR=1 -DLOCALE -DKBUILD_NO_NLS -I /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config -DCONFIG_=\"\"    /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/conf .o  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/zconf .tab.o  -o  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/conf rm /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/zconf .tab.c make [2]: Leaving directory ` /home/CLi/develop/buildroot/buildroot-2013 .05 /support/kconfig ' BR2_DEFCONFIG= '' KCONFIG_AUTOCONFIG= /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/auto .conf KCONFIG_AUTOHEADER= /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/autoconf .h KCONFIG_TRISTATE= /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/tristate .config BUILDROOT_CONFIG= /home/CLi/develop/buildroot/buildroot-2013 .05/.config  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/conf --silentoldconfig Config. in make [1]: Leaving directory ` /home/CLi/develop/buildroot/buildroot-2013 .05' mkdir -p  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/target rsync -a \                  --exclude .empty --exclude .svn --exclude .git \                  --exclude .hg --exclude=CVS --exclude  '*~' \                  /home/CLi/develop/buildroot/buildroot-2013 .05 /system/skeleton/ /home/CLi/develop/buildroot/buildroot-2013 .05 /output/target/ cp support /misc/target-dir-warning .txt  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/target/THIS_IS_NOT_YOUR_ROOT_FILESYSTEM touch /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/ .root >>> host-ccache 3.1.8 Extracting bzcat  /home/CLi/develop/buildroot/buildroot-2013 .05 /dl/ccache-3 .1.8. tar .bz2 |  tar --strip-components=1 -C  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/host-ccache-3 .1.8  -xf - >>> host-ccache 3.1.8 Patching package //ccache >>> host-ccache 3.1.8 Updating config.sub and config.guess for file in config.guess config.sub;  do for i  in $( find /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/host-ccache-3 .1.8 -name $ file );  do cp support /gnuconfig/ $ file $i;  done ;  done >>> host-ccache 3.1.8 Patching libtool >>> host-ccache 3.1.8 Configuring ( cd /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/host-ccache-3 .1.8/ &&  rm -rf config.cache; PATH= /home/CLi/develop/buildroot/buildroot-2013 .05 /output/host/bin : /home/CLi/develop/buildroot/buildroot-2013 .05 /output/host/usr/bin : /home/CLi/develop/crosstool-ng/x-tools/arm-xscale-linux-gnueabi/bin : /opt/crosstool-ng/bin : /home/CLi/develop/crosstool-ng/x-tools/armxscalecurl/bin : /usr/local/bin : /usr/bin : /cygdrive/d/tmp/dev_install_root/Python27_x64 : /cygdrive/d/tmp/dev_install_root/Python27_x64/Lib/site-packages/PyQt4 : /cygdrive/d/tmp/dev_install_root/Perl64/site/bin : /cygdrive/d/tmp/dev_install_root/Perl64/bin : /cygdrive/c/Program Files /Common Files /Microsoft Shared /Windows Live: /cygdrive/c/Program Files (x86) /Common Files /Microsoft Shared /Windows Live: /cygdrive/c/Windows/system32 : /cygdrive/c/Windows : /cygdrive/c/Windows/System32/Wbem : /cygdrive/c/Windows/System32/WindowsPowerShell/v1 .0: /cygdrive/c/Program Files (x86) /Microsoft SQL Server /100/Tools/Binn : /cygdrive/c/Program Files /Microsoft SQL Server /100/Tools/Binn : /cygdrive/c/Program Files /Microsoft SQL Server /100/DTS/Binn : /cygdrive/d/tmp/WordPress/mysql/mysql-5 .5.18 /MySQL/MySQL Server 5.5 /bin : /cygdrive/d/tmp/WordPress/DevRoot/MySQL/MySQL Server 5.5 /bin : /cygdrive/d/tmp/WordPress/DevRoot/php-5 .3.6-Win32-VC9-x64: /cygdrive/d/tmp/WordPress/DevRoot/php-5 .3.6-Win32-VC9-x64 /ext : /cygdrive/d/tmp/WordPress/DevRoot/Python27 : /cygdrive/c/Program Files (x86) /Common Files /Acronis/SnapAPI : /cygdrive/c/Program Files (x86) /Windows Live /Shared : /cygdrive/c/Program Files /Java/jdk1 .7.0_11 /bin : /home/CLi/develop/docbook/tools/fop/lib : /home/CLi/develop/docbook/tools/fop : /cygdrive/d/DevInstallRoot/FF/DD_IDE_1 .1.2 /TOK/BIN : /cygdrive/d/DevInstallRoot/FF/DD_IDE_1 .2.0 /TOK/BIN : /cygdrive/d/DevRoot/EmbeddedDevelop/trunk/Research/CLI/FF/FBK/develop/tools/develop-tools : /cygdrive/d/tmp/WordPress/DevRoot/Python27/Scripts : /cygdrive/d/tmp/dev_install_root/PostgreSQL/8 .3 /bin : /cygdrive/d/tmp/dev_install_root/ant/apache-ant-1 .8.4 /bin : /cygdrive/c/Program Files /nodejs : /cygdrive/c/Program Files /Microsoft/Web Platform Installer: /cygdrive/c/Program Files /TortoiseSVN/bin : /cygdrive/d/DevRoot/IndustrialMobileAutomation/HandheldDataSetter/ANTLR/batchFile : /cygdrive/c/Program Files (x86) /QuickTime/QTSystem : /cygdrive/d/tmp/tmp_dev_root/android/adt-bundle-windows/sdk/platform-tools : /cygdrive/d/tmp/dev_install_root/Tesseract-OCR : /cygdrive/d/tmp/dev_install_root/jython2 .5.3 /bin : /cygdrive/d/devinstallroot/gnuarm/bin : /cygdrive/d/tmp/dev_install_root/HTML Help Workshop: /cygdrive/c/Users/CLi/AppData/Roaming/npm : /usr/lib/lapack : /opt/gcc-4 .0.4-glibc-2.3.6-kernel-2.6.17 /sysroot-arm-xscale-linux-gnu/usr/include : /opt/gcc-4 .0.4-glibc-2.3.6-kernel-2.6.17 /sysroot-arm-xscale-linux-gnu/usr/include/linux AR= "/usr/bin/ar" AS= "/usr/bin/as" LD= "/usr/bin/ld" NM= "/usr/bin/nm" CC= "/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/bin/ccache /usr/bin/gcc" GCC= "/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/bin/ccache /usr/bin/gcc" CXX= "/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/bin/ccache /usr/bin/g++" CPP= "/usr/bin/cpp" CPPFLAGS= "-I/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/include" CFLAGS= "-O2 -I/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/include" CXXFLAGS= "-O2 -I/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/include" LDFLAGS= "-L/home/CLi/develop/buildroot/buildroot-2013.05/output/host/lib -L/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/lib -Wl,-rpath,/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/lib" PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=1 PKG_CONFIG_ALLOW_SYSTEM_LIBS=1 PKG_CONFIG= "/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/bin/pkg-config" PKG_CONFIG_SYSROOT_DIR= "/" PKG_CONFIG_LIBDIR= "/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/lib/pkgconfig:/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/share/pkgconfig" PERLLIB= "/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/lib/perl" LD_LIBRARY_PATH= "/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/lib:" CFLAGS= "-O2 -I/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/include" LDFLAGS= "-L/home/CLi/develop/buildroot/buildroot-2013.05/output/host/lib -L/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/lib -Wl,-rpath,/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/lib" CC= "/usr/bin/gcc" . /configure --prefix= "/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr" --sysconfdir= "/home/CLi/develop/buildroot/buildroot-2013.05/output/host/etc" -- enable -shared --disable-static --disable-gtk-doc --disable-doc --disable-docs --disable-documentation --with-xmlto=no --with-fop=no ccache_cv_zlib_1_2_3=no ) /bin/sh : -c: line 0: syntax error near unexpected token `(' /bin/sh : -c: line 0: `( cd /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/host-ccache-3 .1.8/ &&  rm -rf config.cache; PATH= /home/CLi/develop/buildroot/buildroot-2013 .05 /output/host/bin : /home/CLi/develop/buildroot/buildroot-2013 .05 /output/host/usr/bin : /home/CLi/develop/crosstool-ng/x-tools/arm-xscale-linux-gnueabi/bin : /opt/crosstool-ng/bin : /home/CLi/develop/crosstool-ng/x-tools/armxscalecurl/bin : /usr/local/bin : /usr/bin : /cygdrive/d/tmp/dev_install_root/Python27_x64 : /cygdrive/d/tmp/dev_install_root/Python27_x64/Lib/site-packages/PyQt4 : /cygdrive/d/tmp/dev_install_root/Perl64/site/bin : /cygdrive/d/tmp/dev_install_root/Perl64/bin : /cygdrive/c/Program Files /Common Files /Microsoft Shared /Windows Live: /cygdrive/c/Program Files (x86) /Common Files /Microsoft Shared /Windows Live: /cygdrive/c/Windows/system32 : /cygdrive/c/Windows : /cygdrive/c/Windows/System32/Wbem : /cygdrive/c/Windows/System32/WindowsPowerShell/v1 .0: /cygdrive/c/Program Files (x86) /Microsoft SQL Server /100/Tools/Binn : /cygdrive/c/Program Files /Microsoft SQL Server /100/Tools/Binn : /cygdrive/c/Program Files /Microsoft SQL Server /100/DTS/Binn : /cygdrive/d/tmp/WordPress/mysql/mysql-5 .5.18 /MySQL/MySQL Server 5.5 /bin : /cygdrive/d/tmp/WordPress/DevRoot/MySQL/MySQL Server 5.5 /bin : /cygdrive/d/tmp/WordPress/DevRoot/php-5 .3.6-Win32-VC9-x64: /cygdrive/d/tmp/WordPress/DevRoot/php-5 .3.6-Win32-VC9-x64 /ext : /cygdrive/d/tmp/WordPress/DevRoot/Python27 : /cygdrive/c/Program Files (x86) /Common Files /Acronis/SnapAPI : /cygdrive/c/Program Files (x86) /Windows Live /Shared : /cygdrive/c/Program Files /Java/jdk1 .7.0_11 /bin : /home/CLi/develop/docbook/tools/fop/lib : /home/CLi/develop/docbook/tools/fop : /cygdrive/d/DevInstallRoot/FF/DD_IDE_1 .1.2 /TOK/BIN : /cygdrive/d/DevInstallRoot/FF/DD_IDE_1 .2.0 /TOK/BIN : /cygdrive/d/DevRoot/EmbeddedDevelop/trunk/Research/CLI/FF/FBK/develop/tools/develop-tools : /cygdrive/d/tmp/WordPress/DevRoot/Python27/Scripts : /cygdrive/d/tmp/dev_install_root/PostgreSQL/8 .3 /bin : /cygdrive/d/tmp/dev_install_root/ant/apache-ant-1 .8.4 /bin : /cygdrive/c/Program Files /nodejs : /cygdrive/c/Program Files /Microsoft/Web Platform Installer: /cygdrive/c/Program Files /TortoiseSVN/bin : /cygdrive/d/DevRoot/IndustrialMobileAutomation/HandheldDataSetter/ANTLR/batchFile : /cygdrive/c/Program Files (x86) /QuickTime/QTSystem : /cygdrive/d/tmp/tmp_dev_root/android/adt-bundle-windows/sdk/platform-tools : /cygdrive/d/tmp/dev_install_root/Tesseract-OCR : /cygdrive/d/tmp/dev_install_root/jython2 .5.3 /bin : /cygdrive/d/devinstallroot/gnuarm/bin : /cygdrive/d/tmp/dev_install_root/HTML Help Workshop: /cygdrive/c/Users/CLi/AppData/Roaming/npm : /usr/lib/lapack : /opt/gcc-4 .0.4-glibc-2.3.6-kernel-2.6.17 /sysroot-arm-xscale-linux-gnu/usr/include : /opt/gcc-4 .0.4-glibc-2.3.6-kernel-2.6.17 /sysroot-arm-xscale-linux-gnu/usr/include/linux AR= "/usr/bin/ar" AS= "/usr/bin/as" LD= "/usr/bin/ld" NM= "/usr/bin/nm" CC= "/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/bin/ccache /usr/bin/gcc" GCC= "/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/bin/ccache /usr/bin/gcc" CXX= "/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/bin/ccache /usr/bin/g++" CPP= "/usr/bin/cpp" CPPFLAGS= "-I/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/include" CFLAGS= "-O2 -I/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/include" CXXFLAGS= "-O2 -I/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/include" LDFLAGS= "-L/home/CLi/develop/buildroot/buildroot-2013.05/output/host/lib -L/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/lib -Wl,-rpath,/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/lib" PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=1 PKG_CONFIG_ALLOW_SYSTEM_LIBS=1 PKG_CONFIG= "/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/bin/pkg-config" PKG_CONFIG_SYSROOT_DIR= "/" PKG_CONFIG_LIBDIR= "/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/lib/pkgconfig:/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/share/pkgconfig" PERLLIB= "/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/lib/perl" LD_LIBRARY_PATH= "/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/lib:" CFLAGS= "-O2 -I/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/include" LDFLAGS= "-L/home/CLi/develop/buildroot/buildroot-2013.05/output/host/lib -L/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/lib -Wl,-rpath,/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr/lib" CC= "/usr/bin/gcc" . /configure --prefix= "/home/CLi/develop/buildroot/buildroot-2013.05/output/host/usr" --sysconfdir= "/home/CLi/develop/buildroot/buildroot-2013.05/output/host/etc" -- enable -shared --disable-static --disable-gtk-doc --disable-doc --disable-docs --disable-documentation --with-xmlto=no --with-fop=no ccache_cv_zlib_1_2_3=no )' make : *** [ /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/host-ccache-3 .1.8/.stamp_configured] Error 1   CLi@PC-CLI-1 ~ /develop/buildroot/buildroot-2013 .05 $

然后，对照着makefile，看看能否看出完整的make的逻辑。

 

【折腾过程】

1.此处的：

/usr/bin/make -j4 HOSTCC="/usr/bin/gcc" HOSTCXX="/usr/bin/g++" silentoldconfig

很明显，对应着是：

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1 2	$(BUILD_DIR)/buildroot-config/auto.conf: $(BUILDROOT_CONFIG)      $(MAKE) $(EXTRAMAKEARGS) HOSTCC="$(HOSTCC_NOCCACHE)" HOSTCXX="$(HOSTCXX_NOCCACHE)" silentoldconfig

对应的关系是：

make时，调用的是：

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1	all: world

->

?

1	world: toolchain $(TARGETS_ALL)

->

?

1	toolchain: prepare dirs dependencies $(BASE_TARGETS)

->

?

1	prepare: $(BUILD_DIR)/buildroot-config/auto.conf

->

?

1 2	$(BUILD_DIR)/buildroot-config/auto.conf: $(BUILDROOT_CONFIG)      $(MAKE) $(EXTRAMAKEARGS) HOSTCC="$(HOSTCC_NOCCACHE)" HOSTCXX="$(HOSTCXX_NOCCACHE)" silentoldconfig

 

2.然后继续看剩下的逻辑。

mkdir -p /home/CLi/develop/buildroot/buildroot-2013.05/output/build/buildroot-config/lxdialog

此处，也容易分析出来是：

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1 2 3

$(BUILD_DIR)/buildroot-config/%onf:      mkdir -p $(@D)/lxdialog      $(MAKE) CC="$(HOSTCC_NOCCACHE)" HOSTCC="$(HOSTCC_NOCCACHE)" obj=$(@D) -C $(CONFIG) -f Makefile.br $(@F)

然后反推出来，好像是：

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1 2 3 4 5 6

.PHONY: all world toolchain dirs clean distclean source outputmakefile \      legal-info legal-info-prepare legal-info-clean \      $(BASE_TARGETS) $(TARGETS) $(TARGETS_ALL) \      $(TARGETS_CLEAN) $(TARGETS_DIRCLEAN) $(TARGETS_SOURCE) $(TARGETS_LEGAL_INFO) \      $(TOOLCHAIN_DIR) $(BUILD_DIR) $(STAGING_DIR) $(TARGET_DIR) \      $(HOST_DIR) $(BINARIES_DIR) $(STAMP_DIR)

调用到了all：

?

1	all: menuconfig

->

?

1 2 3

menuconfig: $(BUILD_DIR)/buildroot-config/mconf outputmakefile      @mkdir -p $(BUILD_DIR)/buildroot-config      @$(COMMON_CONFIG_ENV) $< $(CONFIG_CONFIG_IN)

->

?

1 2 3

$(BUILD_DIR)/buildroot-config/%onf:      mkdir -p $(@D)/lxdialog      $(MAKE) CC="$(HOSTCC_NOCCACHE)" HOSTCC="$(HOSTCC_NOCCACHE)" obj=$(@D) -C $(CONFIG) -f Makefile.br $(@F)

好像是的。

3.不管如何，此处，先去创建lxdialog文件夹，然后继续去：

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1	/usr/bin/make CC="/usr/bin/gcc" HOSTCC="/usr/bin/gcc" obj=/home/CLi/develop/buildroot/buildroot-2013.05/output/build/buildroot-config -C support/kconfig -f Makefile.br conf

此处很明显，其实是对应的是：

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71

config: $(BUILD_DIR)/buildroot-config/conf outputmakefile      @mkdir -p $(BUILD_DIR)/buildroot-config      @$(COMMON_CONFIG_ENV) $< $(CONFIG_CONFIG_IN)   oldconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile      mkdir -p $(BUILD_DIR)/buildroot-config      @$(COMMON_CONFIG_ENV) $< --oldconfig $(CONFIG_CONFIG_IN)   randconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile      @mkdir -p $(BUILD_DIR)/buildroot-config      @$(COMMON_CONFIG_ENV) $< --randconfig $(CONFIG_CONFIG_IN)   allyesconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile      @mkdir -p $(BUILD_DIR)/buildroot-config      @$(COMMON_CONFIG_ENV) $< --allyesconfig $(CONFIG_CONFIG_IN)   allnoconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile      @mkdir -p $(BUILD_DIR)/buildroot-config      @$(COMMON_CONFIG_ENV) $< --allnoconfig $(CONFIG_CONFIG_IN)   randpackageconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile      @mkdir -p $(BUILD_DIR)/buildroot-config      @grep -v BR2_PACKAGE_ $(BUILDROOT_CONFIG) > $(CONFIG_DIR)/.config.nopkg      @grep '^config BR2_PACKAGE_' Config.in.legacy | \          while read config pkg; do \          echo "# $$pkg is not set" >> $(CONFIG_DIR)/.config.nopkg; done      @$(COMMON_CONFIG_ENV) \          KCONFIG_ALLCONFIG=$(CONFIG_DIR)/.config.nopkg \          $< --randconfig $(CONFIG_CONFIG_IN)      @rm -f $(CONFIG_DIR)/.config.nopkg   allyespackageconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile      @mkdir -p $(BUILD_DIR)/buildroot-config      @grep -v BR2_PACKAGE_ $(BUILDROOT_CONFIG) > $(CONFIG_DIR)/.config.nopkg      @grep '^config BR2_PACKAGE_' Config.in.legacy | \          while read config pkg; do \          echo "# $$pkg is not set" >> $(CONFIG_DIR)/.config.nopkg; done      @$(COMMON_CONFIG_ENV) \          KCONFIG_ALLCONFIG=$(CONFIG_DIR)/.config.nopkg \          $< --allyesconfig $(CONFIG_CONFIG_IN)      @rm -f $(CONFIG_DIR)/.config.nopkg   allnopackageconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile      @mkdir -p $(BUILD_DIR)/buildroot-config      @grep -v BR2_PACKAGE_ $(BUILDROOT_CONFIG) > $(CONFIG_DIR)/.config.nopkg      @$(COMMON_CONFIG_ENV) \          KCONFIG_ALLCONFIG=$(CONFIG_DIR)/.config.nopkg \          $< --allnoconfig $(CONFIG_CONFIG_IN)      @rm -f $(CONFIG_DIR)/.config.nopkg   silentoldconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile      @mkdir -p $(BUILD_DIR)/buildroot-config      $(COMMON_CONFIG_ENV) $< --silentoldconfig $(CONFIG_CONFIG_IN)   olddefconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile      @mkdir -p $(BUILD_DIR)/buildroot-config      $(COMMON_CONFIG_ENV) $< --olddefconfig $(CONFIG_CONFIG_IN)   defconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile      @mkdir -p $(BUILD_DIR)/buildroot-config      @$(COMMON_CONFIG_ENV) $< --defconfig$(if $(DEFCONFIG),=$(DEFCONFIG)) $(CONFIG_CONFIG_IN)   %_defconfig: $(BUILD_DIR)/buildroot-config/conf $(TOPDIR)/configs/%_defconfig outputmakefile      @mkdir -p $(BUILD_DIR)/buildroot-config      @$(COMMON_CONFIG_ENV) $< --defconfig=$(TOPDIR)/configs/$@ $(CONFIG_CONFIG_IN)   savedefconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile      @mkdir -p $(BUILD_DIR)/buildroot-config      @$(COMMON_CONFIG_ENV) $< \          --savedefconfig=$(if $(DEFCONFIG),$(DEFCONFIG),$(CONFIG_DIR)/defconfig) \          $(CONFIG_CONFIG_IN)

中的某一个。

4.然后去看了看对应的文件夹：

D:\tmp\tmp_dev_root\cgwin\home\CLi\develop\buildroot\buildroot-2013.05\support\kconfig

以及其中的Makefile文件：

Makefile.br

然后其又用：

?

1	include Makefile

而调用了：

D:\tmp\tmp_dev_root\cgwin\home\CLi\develop\buildroot\buildroot-2013.05\support\kconfig\Makefile

此处，即：

执行Makefile.br，传入conf的目标；

而Makefile.br先会去包含Makefile

5.但是具体执行逻辑没看懂。

但是通过：

?

1 2

make [2]: Entering directory ` /home/CLi/develop/buildroot/buildroot-2013 .05 /support/kconfig ' /usr/bin/gcc -I /usr/include/ncursesw -DCURSES_LOC= "<ncursesw/curses.h>"  -DNCURSES_WIDECHAR=1 -DLOCALE -DKBUILD_NO_NLS -I /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config -DCONFIG_=\"\"  -MM *.c >  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/ .depend 2> /dev/null || :

中的：

2>/dev/null

而找到对应的地方了，是：

Makefile.br中的：

?

1 2	$(obj)/.depend: $(wildcard *.h *.c)      $(HOSTCC) $(HOST_EXTRACFLAGS) $(HOSTCFLAGS) -MM *.c > $@ 2>/dev/null || :

此处，也不是完全懂，但是不关心。跳过。

后来看懂了一点：

是生成对应的依赖文件：

D:\tmp\tmp_dev_root\cgwin\home\CLi\develop\buildroot\buildroot-2013.05\output\build\buildroot-config\.depend

此处其内容为：

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

conf.o: conf.c lkc.h expr.h list.h lkc_proto.h confdata.o: confdata.c lkc.h expr.h list.h lkc_proto.h expr.o: expr.c lkc.h expr.h list.h lkc_proto.h images.o: images.c kxgettext.o: kxgettext.c lkc.h expr.h list.h lkc_proto.h mconf.o: mconf.c lkc.h expr.h list.h lkc_proto.h lxdialog/dialog.h menu.o: menu.c lkc.h expr.h list.h lkc_proto.h nconf.o: nconf.c lkc.h expr.h list.h lkc_proto.h nconf.h \   /usr/include/ncursesw/curses.h /usr/include/ncursesw/menu.h \   /usr/include/ncursesw/panel.h /usr/include/ncursesw/form.h \   /usr/include/ncursesw/ncurses.h nconf.gui.o: nconf.gui.c nconf.h /usr/include/ncursesw/curses.h \   /usr/include/ncursesw/menu.h /usr/include/ncursesw/panel.h \   /usr/include/ncursesw/form.h /usr/include/ncursesw/ncurses.h symbol.o: symbol.c lkc.h expr.h list.h lkc_proto.h util.o: util.c lkc.h expr.h list.h lkc_proto.h

6.接下来，主要是去编译一些.c文件：

?

1 2 3 4 5 6 7 8 9

make [2]: Leaving directory ` /home/CLi/develop/buildroot/buildroot-2013 .05 /support/kconfig ' make [2]: Entering directory ` /home/CLi/develop/buildroot/buildroot-2013 .05 /support/kconfig ' /usr/bin/gcc -I /usr/include/ncursesw -DCURSES_LOC= "<ncursesw/curses.h>"  -DNCURSES_WIDECHAR=1 -DLOCALE -DKBUILD_NO_NLS -I /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config -DCONFIG_=\"\"   -c conf.c -o  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/conf .o /usr/bin/gcc -I /usr/include/ncursesw -DCURSES_LOC= "<ncursesw/curses.h>"  -DNCURSES_WIDECHAR=1 -DLOCALE -DKBUILD_NO_NLS -I /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config -DCONFIG_=\"\"  -I. -c  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/zconf .tab.c -o  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/zconf .tab.o In  file included from  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/zconf .tab.c:2500:0: . /confdata .c: In  function ‘conf_split_config’: . /confdata .c:849:6: warning: assignment makes pointer from integer without a cast [enabled by default] /usr/bin/gcc -I /usr/include/ncursesw -DCURSES_LOC= "<ncursesw/curses.h>"  -DNCURSES_WIDECHAR=1 -DLOCALE -DKBUILD_NO_NLS -I /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config -DCONFIG_=\"\"    /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/conf .o  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/zconf .tab.o  -o  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/conf rm /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/zconf .tab.c

所以无需关心。

7.对于：

?

1 2

make [2]: Leaving directory ` /home/CLi/develop/buildroot/buildroot-2013 .05 /support/kconfig ' BR2_DEFCONFIG= '' KCONFIG_AUTOCONFIG= /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/auto .conf KCONFIG_AUTOHEADER= /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/autoconf .h KCONFIG_TRISTATE= /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/tristate .config BUILDROOT_CONFIG= /home/CLi/develop/buildroot/buildroot-2013 .05/.config  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/buildroot-config/conf --silentoldconfig Config. in

则是去调用对应的conf，加上一堆参数，然后去silent的去配置。

传入的参数有

D:\tmp\tmp_dev_root\cgwin\home\CLi\develop\buildroot\buildroot-2013.05\Config.in

存为对应的

D:\tmp\tmp_dev_root\cgwin\home\CLi\develop\buildroot\buildroot-2013.05\.config

8.然后对于：

?

1 2 3 4 5 6 7

make [1]: Leaving directory ` /home/CLi/develop/buildroot/buildroot-2013 .05' mkdir -p  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/target rsync -a \                  --exclude .empty --exclude .svn --exclude .git \                  --exclude .hg --exclude=CVS --exclude  '*~' \                  /home/CLi/develop/buildroot/buildroot-2013 .05 /system/skeleton/ /home/CLi/develop/buildroot/buildroot-2013 .05 /output/target/ cp support /misc/target-dir-warning .txt  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/target/THIS_IS_NOT_YOUR_ROOT_FILESYSTEM

对应着，是：

D:\tmp\tmp_dev_root\cgwin\home\CLi\develop\buildroot\buildroot-2013.05\Makefile

中的：

?

1 2 3 4 5 6 7 8 9 10

$(BUILD_DIR)/.root:      mkdir -p $(TARGET_DIR)      rsync -a \          --exclude .empty --exclude .svn --exclude .git \          --exclude .hg --exclude=CVS --exclude '*~' \          $(TARGET_SKELETON)/ $(TARGET_DIR)/      cp support/misc/target-dir-warning.txt $(TARGET_DIR_WARNING_FILE)      touch $@   $(TARGET_DIR): $(BUILD_DIR)/.root

作用是：

去创建target文件夹。

然后再去看看rsync的-a，–exclude参数的含义：

【整理】Linux命令rsync的用法

然后去拷贝target-dir-warning.txt文件。

而关于target-dir-warning.txt，即THIS_IS_NOT_YOUR_ROOT_FILESYSTEM，详见：

【整理】Buildroot生成的output/target下面的根文件系统rootfs不能直接使用

另外也去对比了rsync和cp：

【整理】Linux命令中：rsync和cp之间的区别

9.然后对于后面的：

?

1 2 3 4 5 6 7

>>> host-ccache 3.1.8 Extracting bzcat  /home/CLi/develop/buildroot/buildroot-2013 .05 /dl/ccache-3 .1.8. tar .bz2 |  tar --strip-components=1 -C  /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/host-ccache-3 .1.8  -xf - >>> host-ccache 3.1.8 Patching package //ccache >>> host-ccache 3.1.8 Updating config.sub and config.guess for file in config.guess config.sub;  do for i  in $( find /home/CLi/develop/buildroot/buildroot-2013 .05 /output/build/host-ccache-3 .1.8 -name $ file );  do cp support /gnuconfig/ $ file $i;  done ;  done >>> host-ccache 3.1.8 Patching libtool >>> host-ccache 3.1.8 Configuring

都找不到对应的makefile是哪里的

其中，关于bzcat，是可以找到：

D:\tmp\tmp_dev_root\cgwin\home\CLi\develop\buildroot\buildroot-2013.05\Makefile

中有：

?

1	BZCAT:=$(call qstrip,$(BR2_BZCAT))

但是没找到被别人调用。

10.后来终于找到了，是在：

（此处忽略之前已经下载：

D:\tmp\tmp_dev_root\cgwin\home\CLi\develop\buildroot\buildroot-2013.05\package\pkg-download.mk

的部分）

D:\tmp\tmp_dev_root\cgwin\home\CLi\develop\buildroot\buildroot-2013.05\package\pkg-generic.mk

中的：

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

# default extract command $(2)_EXTRACT_CMDS ?= \      $$(if $$($(2)_SOURCE),$$(INFLATE$$(suffix $$($(2)_SOURCE))) $(DL_DIR)/$$($(2)_SOURCE) | \      $(TAR) $(TAR_STRIP_COMPONENTS)=1 -C $$($(2)_DIR) $(TAR_OPTIONS) -)   # Unpack the archive $(BUILD_DIR)/%/.stamp_extracted:      @$(call MESSAGE,"Extracting")      $(Q)mkdir -p $(@D)      $($(PKG)_EXTRACT_CMDS)       $(BUILD_DIR)/%/.stamp_patched:      @$(call MESSAGE,"Patching $($(PKG)_DIR_PREFIX)/$(RAWNAME)")      $(foreach hook,$($(PKG)_PRE_PATCH_HOOKS),$(call $(hook))$(sep))      $(foreach p,$($(PKG)_PATCH),support/scripts/apply-patches.sh $(@D) $(DL_DIR) $(p)$(sep))      $(Q)( \      for D in $(PATCH_BASE_DIRS); do \        if test -d $${D}; then \          if test -d $${D}/$($(PKG)_VERSION); then \            support/scripts/apply-patches.sh $(@D) $${D}/$($(PKG)_VERSION) \*.patch \*.patch.$(ARCH) || exit 1; \          else \            support/scripts/apply-patches.sh $(@D) $${D} \*.patch \*.patch.$(ARCH) || exit 1; \          fi; \        fi; \      done; \      )      $(foreach hook,$($(PKG)_POST_PATCH_HOOKS),$(call $(hook))$(sep))      $(Q)touch $@   # Configure $(BUILD_DIR)/%/.stamp_configured:      $(foreach hook,$($(PKG)_PRE_CONFIGURE_HOOKS),$(call $(hook))$(sep))      @$(call MESSAGE,"Configuring")      $($(PKG)_CONFIGURE_CMDS)      $(foreach hook,$($(PKG)_POST_CONFIGURE_HOOKS),$(call $(hook))$(sep))      $(Q)touch $@

去解压Extracting，打补丁Patching和配置Configuring的。其中在：

D:\tmp\tmp_dev_root\cgwin\home\CLi\develop\buildroot\buildroot-2013.05\package\pkg-autotools.mk

中调用对应的PATCH的HOOK的：

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

# # Utility function to upgrade config.sub and config.guess files # # argument 1 : directory into which config.guess and config.sub need # to be updated. Note that config.sub and config.guess are searched # recursively in this directory. # define CONFIG_UPDATE      for file in config.guess config.sub; do \          for i in $$(find $(1) -name $$file); do \              cp support/gnuconfig/$$file $$i; \          done; \      done endef   # # Hook to update config.sub and config.guess if needed # define UPDATE_CONFIG_HOOK         @$$(call MESSAGE,"Updating config.sub and config.guess")         $$(call CONFIG_UPDATE,$$(@D)) endef   $(2)_POST_PATCH_HOOKS += UPDATE_CONFIG_HOOK

此时，真正明白了：

是在：

D:\tmp\tmp_dev_root\cgwin\home\CLi\develop\buildroot\buildroot-2013.05\package\pkg-generic.mk

中的：

?

1 2 3 4 5 6 7

# Configure $(BUILD_DIR)/%/.stamp_configured:      $(foreach hook,$($(PKG)_PRE_CONFIGURE_HOOKS),$(call $(hook))$(sep))      @$(call MESSAGE,"Configuring")      $($(PKG)_CONFIGURE_CMDS)      $(foreach hook,$($(PKG)_POST_CONFIGURE_HOOKS),$(call $(hook))$(sep))      $(Q)touch $@

中的：

?

1	$($(PKG)_CONFIGURE_CMDS)

去产生对应的：

(cd /home/CLi/develop/buildroot/buildroot-2013.05/output/build/host-ccache-3.1.8/ && rm -rf config.cache; PATH=xxxxxx …… )

即，其中包含了我们此处关心的PATH的。

11.而对应的：

?

1	$($(PKG)_CONFIGURE_CMDS)

是在

D:\tmp\tmp_dev_root\cgwin\home\CLi\develop\buildroot\buildroot-2013.05\package\pkg-autotools.mk

中的host的package的configure的：

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

# Configure package for host # disable all kind of documentation generation in the process, # because it often relies on host tools which may or may not be # installed. define $(2)_CONFIGURE_CMDS      (cd $$($$(PKG)_SRCDIR) && rm -rf config.cache; \              $$(HOST_CONFIGURE_OPTS) \          CFLAGS="$$(HOST_CFLAGS)" \          LDFLAGS="$$(HOST_LDFLAGS)" \                  $$($$(PKG)_CONF_ENV) \          ./configure \          --prefix="$$(HOST_DIR)/usr" \          --sysconfdir="$$(HOST_DIR)/etc" \          --enable-shared --disable-static \          --disable-gtk-doc \          --disable-doc \          --disable-docs \          --disable-documentation \          --with-xmlto=no \          --with-fop=no \          $$($$(PKG)_CONF_OPT) \      ) endef endif endif

此处，对应着是：

?

1	$$(HOST_CONFIGURE_OPTS)

包括了我们关心的PATH变量的。

12.而

?

1	$$(HOST_CONFIGURE_OPTS)

是在：

D:\tmp\tmp_dev_root\cgwin\home\CLi\develop\buildroot\buildroot-2013.05\package\Makefile.in

中的：

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

TARGET_MAKE_ENV=PATH=$(TARGET_PATH) \          PERLLIB="$(HOST_DIR)/usr/lib/perl"   HOST_CONFIGURE_OPTS=PATH=$(HOST_PATH) \          AR="$(HOSTAR)" \          AS="$(HOSTAS)" \          LD="$(HOSTLD)" \          NM="$(HOSTNM)" \          CC="$(HOSTCC)" \          GCC="$(HOSTCC)" \          CXX="$(HOSTCXX)" \          CPP="$(HOSTCPP)" \          CPPFLAGS="$(HOST_CPPFLAGS)" \          CFLAGS="$(HOST_CFLAGS)" \          CXXFLAGS="$(HOST_CXXFLAGS)" \          LDFLAGS="$(HOST_LDFLAGS)" \          PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=1 \          PKG_CONFIG_ALLOW_SYSTEM_LIBS=1 \          PKG_CONFIG="$(PKG_CONFIG_HOST_BINARY)" \          PKG_CONFIG_SYSROOT_DIR="/" \          PKG_CONFIG_LIBDIR="$(HOST_DIR)/usr/lib/pkgconfig:$(HOST_DIR)/usr/share/pkgconfig" \          PERLLIB="$(HOST_DIR)/usr/lib/perl" \          LD_LIBRARY_PATH="$(HOST_DIR)/usr/lib:$(LD_LIBRARY_PATH)"

至此，彻底明白了，对应的PATH，就是此处添加的：

?

1	PATH=$(HOST_PATH)

13.而对应的：

?

1

HOST_PATH

是对应的同文件：

D:\tmp\tmp_dev_root\cgwin\home\CLi\develop\buildroot\buildroot-2013.05\package\Makefile.in

中的：

?

1	HOST_PATH=$(HOST_DIR)/bin:$(HOST_DIR)/usr/bin:$(PATH)

而其中是，直接包含：

?

1

$(PATH)

进来的。

所以：

cygwin中的PATH包含了Window中的一些变量，其中包含了空格和括号，导致之前出错的。

所以此处，应该是去对PATH得到的值，加上引号，估计就可以解决问题了。

 

【总结】

至此，算是搞懂了，绝大部分的，Buildroot中的make的逻辑。

也找到了真正的，此处所关心的，PATH路径引入的位置，是：

D:\tmp\tmp_dev_root\cgwin\home\CLi\develop\buildroot\buildroot-2013.05\package\Makefile.in

中的：

?

1	HOST_PATH=$(HOST_DIR)/bin:$(HOST_DIR)/usr/bin:$(PATH)

所以如果有路径方面的问题，估计就是关心一下package\Makefile.in中的各种路径变量即可。

---

后续问题的解决，详见：

【已解决】Cygwin下为xscale编译BuildRoot时make出错：/bin/sh: -c: line 0: syntax error near unexpected token `(‘

转载请注明：在路上 » 【记录】尝试分析Buildroot在make menuconfig后make时的内部执行逻辑