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|
dnl AC_GCC_VERSION
dnl check for compiler version
dnl sets COMPILER_VERSION and GCC_VERSION
AC_DEFUN([AC_CC_VERSION],
[
AC_MSG_CHECKING([C compiler version])
COMPILER_VERSION=`$CC -v 2>&1 | grep version`
case "$COMPILER_VERSION" in
*gcc*)
dnl Ok, how to turn $3 into the real $3
GCC_VERSION=`echo $COMPILER_VERSION | \
sed -e 's/[[^ ]]*\ [[^ ]]*\ \([[^ ]]*\)\ .*/\1/'` ;;
*) GCC_VERSION=unknown ;;
esac
AC_MSG_RESULT($GCC_VERSION)
])
dnl AC_TRY_CCFLAG([CCFLAG], [VAR], [ACTION-IF-WORKS], [ACTION-IF-FAILS])
dnl check if $CC supports a given flag
AC_DEFUN([AC_TRY_CCFLAG],
[
AC_REQUIRE([AC_PROG_CC])
ac_save_CFLAGS=$CFLAGS
CFLAGS=$1
AC_CACHE_CHECK([whether $CC accepts $1 flag], [ac_cv_flag_$2],
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
[AS_VAR_SET([ac_cv_flag_$2], [yes])],
[AS_VAR_SET([ac_cv_flag_$2], [no])])])
CFLAGS=$ac_save_CFLAGS
$2=AS_VAR_GET([ac_cv_flag_$2])
if test "$2" = yes; then
ifelse([$3], [], [:], [$3])
else
ifelse([$4], [], [:], [$4])
fi
])
dnl AC_IF_YES([TEST-FOR-YES], [ACTION-IF-TRUE], [ACTION-IF-FALSE])
dnl AS_IF() abstraction, checks shell variable for 'yes'
AC_DEFUN([AC_IF_YES], [AS_IF([test $$1 = yes], [$2], [$3])])
dnl AC_TRY_LDFLAGS([LDFLAGS], [VAR], [ACTION-IF-WORKS], [ACTION-IF-FAILS])
dnl check if $CC supports given ld flags
AC_DEFUN([AC_TRY_LDFLAGS],
[
AC_REQUIRE([AC_PROG_CC])
ac_save_LDFLAGS=$LDFLAGS
LDFLAGS=$1
AC_CACHE_CHECK([whether $CC accepts $1 ld flags], [ac_cv_flag_$2],
[AC_LINK_IFELSE([AC_LANG_PROGRAM()],
[AS_VAR_SET([ac_cv_flag_$2], [yes])],
[AS_VAR_SET([ac_cv_flag_$2], [no])])])
LDFLAGS=$ac_save_LDFLAGS
$2=AS_VAR_GET([ac_cv_flag_$2])
if test "$2" = yes; then
ifelse([$3], [], [:], [$3])
else
ifelse([$4], [], [:], [$4])
fi
])
|
