63 lines
1.8 KiB
Text
63 lines
1.8 KiB
Text
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# FIXME: We temporarily define our own version of AC_PROG_CC. This is
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# copied from autoconf 2.12, but does not call AC_PROG_CC_WORKS. We
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# are probably using a cross compiler, which will not be able to fully
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# link an executable. This should really be fixed in autoconf
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# itself.
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AC_DEFUN([LIB_AC_PROG_CC_GNU],
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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(${CC-cc} -E conftest.c) | egrep yes >/dev/null 2>&1; then
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ac_cv_prog_gcc=yes
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else
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ac_cv_prog_gcc=no
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fi])])
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AC_DEFUN([LIB_AM_PROG_AS],
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[# By default we simply use the C compiler to build assembly code.
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AC_REQUIRE([LIB_AC_PROG_CC])
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test "${CCAS+set}" = set || CCAS=$CC
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test "${CCASFLAGS+set}" = set || CCASFLAGS=$CFLAGS
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AC_ARG_VAR([CCAS], [assembler compiler command (defaults to CC)])
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AC_ARG_VAR([CCASFLAGS], [assembler compiler flags (defaults to CFLAGS)])
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])
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AC_DEFUN([LIB_AC_PROG_CC],
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[AC_BEFORE([$0], [AC_PROG_CPP])dnl
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AC_CHECK_PROG(CC, gcc, gcc)
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_AM_DEPENDENCIES(CC)
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if test -z "$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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