Chris@82: dnl @synopsis AX_GCC_VERSION(MAJOR, MINOR, PATCHLEVEL, [ACTION-SUCCESS], [ACTION-FAILURE])
Chris@82: dnl @summary check wither gcc is at least version MAJOR.MINOR.PATCHLEVEL
Chris@82: dnl @category InstalledPackages
Chris@82: dnl
Chris@82: dnl Check whether we are using gcc and, if so, whether its version
Chris@82: dnl is at least MAJOR.MINOR.PATCHLEVEL
Chris@82: dnl
Chris@82: dnl ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
Chris@82: dnl success/failure.
Chris@82: dnl
Chris@82: dnl @version 2005-05-30
Chris@82: dnl @license GPLWithACException
Chris@82: dnl @author Steven G. Johnson <stevenj@alum.mit.edu> and Matteo Frigo.
Chris@82: AC_DEFUN([AX_GCC_VERSION],
Chris@82: [
Chris@82: AC_REQUIRE([AC_PROG_CC])
Chris@82: AC_CACHE_CHECK(whether we are using gcc $1.$2.$3 or later, ax_cv_gcc_$1_$2_$3,
Chris@82: [
Chris@82: ax_cv_gcc_$1_$2_$3=no
Chris@82: if test "$GCC" = "yes"; then
Chris@82: dnl The semicolon after "yes" below is to pacify NeXT's syntax-checking cpp.
Chris@82: AC_EGREP_CPP(yes, [
Chris@82: #ifdef __GNUC__
Chris@82: #  if (__GNUC__ > $1) || (__GNUC__ == $1 && __GNUC_MINOR__ > $2) \
Chris@82:    || (__GNUC__ == $1 && __GNUC_MINOR__ == $2 && __GNUC_PATCHLEVEL__ >= $3)
Chris@82:      yes;
Chris@82: #  endif
Chris@82: #endif
Chris@82: ], [ax_cv_gcc_$1_$2_$3=yes])
Chris@82: fi
Chris@82: ])
Chris@82: if test "$ax_cv_gcc_$1_$2_$3" = yes; then
Chris@82: 	m4_default([$4], :)
Chris@82: else
Chris@82: 	m4_default([$5], :)
Chris@82: fi
Chris@82: ])
Chris@82: