38 lines
927 B
Plaintext
38 lines
927 B
Plaintext
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dnl
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dnl This ugly hack is needed because the Cygnus configure script won't
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dnl tell us what CC is going to be, and "cc" isn't always right. (The
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dnl top-level Makefile will always override anything we choose here, so
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dnl the usual gcc/cc selection is useless.)
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dnl
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dnl It knows where it is in the tree; don't try using it elsewhere.
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dnl
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undefine([AC_PROG_CC])dnl
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define(AC_PROG_CC,
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[AC_BEFORE([$0], [AC_PROG_CPP])dnl
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AC_PROVIDE([$0])dnl
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dnl
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dnl The ugly bit...
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dnl
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AC_MSG_CHECKING([for CC])
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dnl Don't bother with cache.
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test -z "$CC" && CC=`egrep '^CC *=' ../Makefile | tail -1 | sed 's/^CC *= *//'`
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test -z "$CC" && CC=cc
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AC_MSG_RESULT(setting CC to $CC)
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AC_SUBST(CC)
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dnl
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dnl
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# Find out if we are using GNU C, under whatever name.
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cat > conftest.c <<EOF
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#ifdef __GNUC__
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yes
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#endif
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EOF
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${CC-cc} -E conftest.c > conftest.out 2>&1
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if egrep yes conftest.out >/dev/null 2>&1; then
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GCC=yes
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else
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GCC=
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fi
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rm -f conftest*
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])dnl
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