checkergcc.m4

来自「lzo-1.08-src.zip 高效的压缩解压代码」· M4 代码 · 共 23 行

## --------------------------------------------------------- ##
## Check for checkergcc.                                     ##
## Adapted from AC_PROG_CC_GNU.                              ##
## --------------------------------------------------------- ##

# serial 1

AC_DEFUN(mfx_PROG_CC_CHECKERGCC,
[AC_CACHE_CHECK([whether we are using checkergcc], mfx_cv_prog_checkergcc,
[dnl The semicolon is to pacify NeXT's syntax-checking cpp.
cat > conftest.c <<EOF
#ifdef __GNUC__
#ifdef __CHECKER__
  yes;
#endif
#endif
EOF
if AC_TRY_COMMAND(${CC-cc} -E conftest.c) | egrep yes >/dev/null 2>&1; then
  mfx_cv_prog_checkergcc=yes
else
  mfx_cv_prog_checkergcc=no
fi])])