mirror of
git://sourceware.org/git/lvm2.git
synced 2024-10-29 21:55:56 +03:00
64 lines
1.8 KiB
Plaintext
64 lines
1.8 KiB
Plaintext
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
|
|
])
|