cannam@167: dnl @synopsis AX_GCC_VERSION(MAJOR, MINOR, PATCHLEVEL, [ACTION-SUCCESS], [ACTION-FAILURE])
cannam@167: dnl @summary check wither gcc is at least version MAJOR.MINOR.PATCHLEVEL
cannam@167: dnl @category InstalledPackages
cannam@167: dnl
cannam@167: dnl Check whether we are using gcc and, if so, whether its version
cannam@167: dnl is at least MAJOR.MINOR.PATCHLEVEL
cannam@167: dnl
cannam@167: dnl ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
cannam@167: dnl success/failure.
cannam@167: dnl
cannam@167: dnl @version 2005-05-30
cannam@167: dnl @license GPLWithACException
cannam@167: dnl @author Steven G. Johnson <stevenj@alum.mit.edu> and Matteo Frigo.
cannam@167: AC_DEFUN([AX_GCC_VERSION],
cannam@167: [
cannam@167: AC_REQUIRE([AC_PROG_CC])
cannam@167: AC_CACHE_CHECK(whether we are using gcc $1.$2.$3 or later, ax_cv_gcc_$1_$2_$3,
cannam@167: [
cannam@167: ax_cv_gcc_$1_$2_$3=no
cannam@167: if test "$GCC" = "yes"; then
cannam@167: dnl The semicolon after "yes" below is to pacify NeXT's syntax-checking cpp.
cannam@167: AC_EGREP_CPP(yes, [
cannam@167: #ifdef __GNUC__
cannam@167: #  if (__GNUC__ > $1) || (__GNUC__ == $1 && __GNUC_MINOR__ > $2) \
cannam@167:    || (__GNUC__ == $1 && __GNUC_MINOR__ == $2 && __GNUC_PATCHLEVEL__ >= $3)
cannam@167:      yes;
cannam@167: #  endif
cannam@167: #endif
cannam@167: ], [ax_cv_gcc_$1_$2_$3=yes])
cannam@167: fi
cannam@167: ])
cannam@167: if test "$ax_cv_gcc_$1_$2_$3" = yes; then
cannam@167: 	m4_default([$4], :)
cannam@167: else
cannam@167: 	m4_default([$5], :)
cannam@167: fi
cannam@167: ])
cannam@167: