1dnl Usage: TL_AC_GCC_VERSION(TOPSRCDIR)
2dnl
3dnl Set up the variables:
4dnl
5dnl     gcc_version_trigger: pathname of gcc's version.c, if available
6dnl     gcc_version_full: full gcc version string
7dnl     gcc_version: the first "word" in $gcc_version_full
8dnl
9dnl TOPSRCDIR is the top-level source directory.
10AC_DEFUN([TL_AC_GCC_VERSION],
11[
12changequote(,)dnl
13if test "${with_gcc_version_trigger+set}" = set; then
14  gcc_version_trigger=$with_gcc_version_trigger
15else
16  gcc_version_trigger=$1/gcc/version.c
17fi
18if test -f "${gcc_version_trigger}"; then
19  gcc_version_full=`grep version_string "${gcc_version_trigger}" | sed -e 's/.*"\([^"]*\)".*/\1/'`
20else
21  gcc_version_full=`$CC -v 2>&1 | sed -n 's/^gcc version //p'`
22fi
23gcc_version=`echo ${gcc_version_full} | sed -e 's/\([^ ]*\) .*/\1/'`
24changequote([,])dnl
25AC_SUBST(gcc_version_trigger)
26AC_SUBST(gcc_version_full)
27AC_SUBST(gcc_version)
28])dnl
29