c496cbb6bd
Contributor list:
- Andrew Waterman <andrew@sifive.com>
- Palmer Dabbelt <palmer@dabbelt.com>
- Kito Cheng <kito.cheng@gmail.com>
- Alex Suykov <alex.suykov@gmail.com>
73 lines
2.0 KiB
Plaintext
73 lines
2.0 KiB
Plaintext
#=========================================================================
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# aclocal.m4 for maven libgloss
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#=========================================================================
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# We cannot use the normal AC_PROG_CC since that macro will try and do a
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# link with the found compiler. Since we don't have all the startup
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# files setup yet (that's what we are compiling in libgloss!) we want to
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# find a compiler without actually doing a link. So the LIB_AC_PROG_CC
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# check is copied from xcc/src/libgloss/acinclude.m4
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#-------------------------------------------------------------------------
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# LIB_AC_PROG_CC_GNU
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#-------------------------------------------------------------------------
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AC_DEFUN([LIB_AC_PROG_CC_GNU],
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[
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AC_CACHE_CHECK(whether we are using GNU C, ac_cv_prog_gcc,
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[dnl The semicolon is to pacify NeXT's syntax-checking cpp.
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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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if AC_TRY_COMMAND(${CC-cc} -E conftest.c) | egrep yes >/dev/null 2>&1; then
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ac_cv_prog_gcc=yes
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else
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ac_cv_prog_gcc=no
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fi
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])
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])
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#-------------------------------------------------------------------------
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# LIB_AC_PROG_CC
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#-------------------------------------------------------------------------
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AC_DEFUN([LIB_AC_PROG_CC],
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[
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AC_BEFORE([$0],[AC_PROG_CPP])dnl
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AC_CHECK_PROG(CC, gcc, gcc)
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if test -z "$CC"; then
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AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
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test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
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fi
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LIB_AC_PROG_CC_GNU
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if test $ac_cv_prog_gcc = yes; then
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GCC=yes
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dnl Check whether -g works, even if CFLAGS is set, in case the package
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dnl plays around with CFLAGS (such as to build both debugging and
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dnl normal versions of a library), tasteless as that idea is.
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ac_test_CFLAGS="${CFLAGS+set}"
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ac_save_CFLAGS="$CFLAGS"
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CFLAGS=
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_AC_PROG_CC_G
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if test "$ac_test_CFLAGS" = set; then
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CFLAGS="$ac_save_CFLAGS"
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elif test $ac_cv_prog_cc_g = yes; then
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CFLAGS="-g -O2"
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else
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CFLAGS="-O2"
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fi
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else
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GCC=
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test "${CFLAGS+set}" = set || CFLAGS="-g"
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fi
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])
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