Chris@10: dnl @synopsis AX_GCC_VERSION(MAJOR, MINOR, PATCHLEVEL, [ACTION-SUCCESS], [ACTION-FAILURE])
Chris@10: dnl @summary check wither gcc is at least version MAJOR.MINOR.PATCHLEVEL
Chris@10: dnl @category InstalledPackages
Chris@10: dnl
Chris@10: dnl Check whether we are using gcc and, if so, whether its version
Chris@10: dnl is at least MAJOR.MINOR.PATCHLEVEL
Chris@10: dnl
Chris@10: dnl ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
Chris@10: dnl success/failure.
Chris@10: dnl
Chris@10: dnl @version 2005-05-30
Chris@10: dnl @license GPLWithACException
Chris@10: dnl @author Steven G. Johnson <stevenj@alum.mit.edu> and Matteo Frigo.
Chris@10: AC_DEFUN([AX_GCC_VERSION],
Chris@10: [
Chris@10: AC_REQUIRE([AC_PROG_CC])
Chris@10: AC_CACHE_CHECK(whether we are using gcc $1.$2.$3 or later, ax_cv_gcc_$1_$2_$3,
Chris@10: [
Chris@10: ax_cv_gcc_$1_$2_$3=no
Chris@10: if test "$GCC" = "yes"; then
Chris@10: dnl The semicolon after "yes" below is to pacify NeXT's syntax-checking cpp.
Chris@10: AC_EGREP_CPP(yes, [
Chris@10: #ifdef __GNUC__
Chris@10: #  if (__GNUC__ > $1) || (__GNUC__ == $1 && __GNUC_MINOR__ > $2) \
Chris@10:    || (__GNUC__ == $1 && __GNUC_MINOR__ == $2 && __GNUC_PATCHLEVEL__ >= $3)
Chris@10:      yes;
Chris@10: #  endif
Chris@10: #endif
Chris@10: ], [ax_cv_gcc_$1_$2_$3=yes])
Chris@10: fi
Chris@10: ])
Chris@10: if test "$ax_cv_gcc_$1_$2_$3" = yes; then
Chris@10: 	m4_default([$4], :)
Chris@10: else
Chris@10: 	m4_default([$5], :)
Chris@10: fi
Chris@10: ])
Chris@10: