2018-04-30 14:37:08 +00:00
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dnl @synopsis AX_GCC_VERSION(MAJOR, MINOR, PATCHLEVEL, [ACTION-SUCCESS], [ACTION-FAILURE])
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2020-12-25 19:15:11 +00:00
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dnl @summary check whether gcc is at least version MAJOR.MINOR.PATCHLEVEL
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2018-04-30 14:37:08 +00:00
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dnl @category InstalledPackages
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dnl
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dnl Check whether we are using gcc and, if so, whether its version
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dnl is at least MAJOR.MINOR.PATCHLEVEL
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dnl
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dnl ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
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dnl success/failure.
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dnl
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dnl @version 2005-05-30
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dnl @license GPLWithACException
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dnl @author Steven G. Johnson <stevenj@alum.mit.edu> and Matteo Frigo.
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AC_DEFUN([AX_GCC_VERSION],
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[
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AC_REQUIRE([AC_PROG_CC])
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AC_CACHE_CHECK(whether we are using gcc $1.$2.$3 or later, ax_cv_gcc_$1_$2_$3,
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[
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ax_cv_gcc_$1_$2_$3=no
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if test "$GCC" = "yes"; then
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dnl The semicolon after "yes" below is to pacify NeXT's syntax-checking cpp.
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AC_EGREP_CPP(yes, [
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#ifdef __GNUC__
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# if (__GNUC__ > $1) || (__GNUC__ == $1 && __GNUC_MINOR__ > $2) \
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|| (__GNUC__ == $1 && __GNUC_MINOR__ == $2 && __GNUC_PATCHLEVEL__ >= $3)
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yes;
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# endif
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#endif
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], [ax_cv_gcc_$1_$2_$3=yes])
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fi
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])
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if test "$ax_cv_gcc_$1_$2_$3" = yes; then
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m4_default([$4], :)
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else
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m4_default([$5], :)
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fi
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])
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