2019-12-03 19:00:01 +00:00
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# SYNOPSIS
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#
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# GS_CHECK_GCC_VERSION()
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#
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# DESCRIPTION
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#
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# Extracts the major and minor version numbers from a GCC-like compiler (GCC or clang)
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# into the following variables:
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# * gs_cv_gcc_major_version
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# * gs_cv_gcc_minor_version
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# * gs_cv_gcc_parsed_version (the combined version string)
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AC_DEFUN([GS_CHECK_GCC_VERSION],dnl
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[AC_REQUIRE([AC_PROG_CC])
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2019-12-03 22:29:26 +00:00
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AC_REQUIRE([AC_PROG_AWK])
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2019-12-03 19:00:01 +00:00
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AC_REQUIRE([GS_CHECK_CC_IS_CLANG])
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if test x"${gs_cv_cc_is_clang}" = x"yes"; then
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compiler_identification="clang"
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else
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compiler_identification="GCC"
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fi
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AC_CACHE_CHECK([for the ${compiler_identification} version],[_gs_cv_gcc_parsed_version], [dnl
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_gs_cv_gcc_major_version=""
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_gs_cv_gcc_minor_version=""
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_gs_cv_gcc_parsed_version="no: it's not gcc"
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if test x"${GCC}" = x"yes" ; then
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dnl Running gcc -dumpversion we get something like 2.95.4 or
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dnl egcs-2.91.66 or 3.0.2 or 3.1 20011211
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dnl We want to discard anything but the major number.
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dnl Explanation of the regexp -
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dnl \([^0-9]*\) matches non numeric chars at the beginning
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dnl \([0-9][0-9]*\) matches 1 or more numeric chars (this is the 2^nd
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dnl subpattern)
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dnl \([^0-9]*\) matches one or more non numeric chars
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dnl \([0-9][0-9]*\) matches 1 or more numeric chars (this is the 4^nd
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dnl subpattern)
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dnl \([^0-9].*\) matches a non numeric char followed by anything
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dnl /\2/ replace the whole lot with the 2^nd subpattern
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dnl /\4/ replace the whole lot with the 4^nd subpattern
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dnl All square brackets are doubled because this file is processed by m4 first.
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dnl Finally, any error messages are redirected to &5, so that they are logged
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dnl into config.log but don't clutter the normal user output.
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2020-06-07 19:39:38 +00:00
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_gs_cv_gcc_major_version=`(${CC} -dumpfullversion -dumpversion | sed "s/\([[^0-9]]*\)\([[0-9]][[0-9]]*\)\([[^0-9]]*\)\([[0-9]][[0-9]]*\)\([[^0-9]]*.*\)/\2/") 2>&5`;
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_gs_cv_gcc_minor_version=`(${CC} -dumpfullversion -dumpversion | sed "s/\([[^0-9]]*\)\([[0-9]][[0-9]]*\)\([[^0-9]]*\)\([[0-9]][[0-9]]*\)\([[^0-9]]*.*\)/\4/") 2>&5`;
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2019-12-03 19:00:01 +00:00
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_gs_cv_gcc_parsed_version="${_gs_cv_gcc_major_version}.${_gs_cv_gcc_minor_version}";
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fi
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])
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if test ! x"${_gs_cv_gcc_parsed_version}" = x"no: it's not gcc"; then
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2019-12-03 22:29:26 +00:00
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_gs_cv_gcc_major_version=$(echo $_gs_cv_gcc_parsed_version | $AWK -F. '{ print $[1] }')
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_gs_cv_gcc_minor_version=$(echo $_gs_cv_gcc_parsed_version | $AWK -F. '{ print $[2] }')
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2019-12-03 19:00:01 +00:00
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fi
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AS_VAR_IF([_gs_cv_gcc_major_version], [""], [AS_UNSET([gs_cv_gcc_major_version])], [AS_VAR_SET([gs_cv_gcc_major_version], [${_gs_cv_gcc_major_version}])])
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AS_VAR_IF([_gs_cv_gcc_minor_version], [""], [AS_UNSET([gs_cv_gcc_minor_version])], [AS_VAR_SET([gs_cv_gcc_minor_version], [${_gs_cv_gcc_minor_version}])])
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AS_VAR_IF([_gs_cv_gcc_major_version], [""], [AS_UNSET([gs_cv_gcc_parsed_version])], [AS_VAR_SET([gs_cv_gcc_parsed_version], ["${_gs_cv_gcc_major_version}.${_gs_cv_gcc_minor_version}"])])
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])
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