missing.m4

来自「这是一个自动生成MAKEFILE的工具。相信大家都听说过。在LINUX工程项目里」· M4 代码 · 共 19 行

## --------------------------------------------------------- ##
## Fake the existence of programs that GNU maintainers use.  ##
## --------------------------------------------------------- ##
dnl AM_MISSING_PROG(NAME, PROGRAM, DIRECTORY)
dnl The program must properly implement --version.
AC_DEFUN([AM_MISSING_PROG],
[AC_MSG_CHECKING(for working $2)
# Run test in a subshell; some versions of sh will print an error if
# an executable is not found, even if stderr is redirected.
# Redirect stdin to placate older versions of autoconf.  Sigh.
if ($2 --version) < /dev/null > /dev/null 2>&1; then
   $1=$2
   AC_MSG_RESULT(found)
else
   $1="$3/missing $2"
   AC_MSG_RESULT(missing)
fi
AC_SUBST($1)])