如何检测系统是否为大小写敏感的文件系统

ifneq ($(HOST_OS),windows)

ifneq ($(HOST_OS)-$(HOST_ARCH),darwin-ppc)

# check for a case sensitive file system

ifneq (a,$(shell mkdir -p $(OUT_DIR) ; \

               echo a > $(OUT_DIR)/casecheck.txt; \

                   echo B > $(OUT_DIR)/CaseCheck.txt; \

               cat $(OUT_DIR)/casecheck.txt))

$(warning************************************************************)

$(warning You are building on a case-insensitivefilesystem.)

$(warning Please move your source tree to acase-sensitive filesystem.)

$(warning************************************************************)

$(error Case-insensitive filesystems not supported)

endif

endif

endif

1.mkdir bash命令的使用

   mkdir -p

USERNAME@USERNAME-desktop:~$ mkdir --help

Usage: mkdir [OPTION]... DIRECTORY...

Create the DIRECTORY(ies), if they do not alreadyexist.

Mandatory arguments to long options are mandatory forshort options too.

  -m,--mode=MODE   set file mode (as inchmod), not a=rwx - umask

  -p, --parents     no error if existing, make parent directoriesas needed

  -v,--verbose     print a message for eachcreated directory

  -Z,--context=CTX  set the SELinux securitycontext of each created

                     directory to CTX

     --help     display this help andexit

     --version  output versioninformation and exit

 

Report mkdir bugs to bug-coreutils@gnu.org

GNU coreutils home page:<http://www.gnu.org/software/coreutils/>

General help using GNU software:<http://www.gnu.org/gethelp/>

Report mkdir translation bugs to<http://translationproject.org/team/>

2.echo bash命令的使用

  echo off

  echo on

  @echo off  @echo on

3.cat bash命令的使用

 

以下是检测路径中是否包含有空格

# Make sure that there are no spaces in the absolutepath; the

# build system can't deal with them.

ifneq ($(words $(shell pwd)),1)

$(warning ************************************************************)

$(warning You are building in a directory whoseabsolute path contains)

$(warning a space character:)

$(warning $(space))

$(warning "$(shell pwd)")

$(warning $(space))

$(warning Please move your source tree to a path thatdoes not contain)

$(warning any spaces.)

$(warning************************************************************)

$(error Directory names containing spaces notsupported)

endif

1.words函数在make 文件中的使用

2.pwd 在bash 命令中的使用