| 1 | # FIXME: We temporarily define our own version of AC_PROG_CC. This is |
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| 2 | # copied from autoconf 2.12, but does not call AC_PROG_CC_WORKS. We |
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| 3 | # are probably using a cross compiler, which will not be able to fully |
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| 4 | # link an executable. This should really be fixed in autoconf |
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| 5 | # itself. |
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| 6 | |
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| 7 | AC_DEFUN([LIB_AC_PROG_CC_GNU], |
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| 8 | [AC_CACHE_CHECK(whether we are using GNU C, ac_cv_prog_gcc, |
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| 9 | [dnl The semicolon is to pacify NeXT's syntax-checking cpp. |
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| 10 | cat > conftest.c <<EOF |
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| 11 | #ifdef __GNUC__ |
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| 12 | yes; |
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| 13 | #endif |
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| 14 | EOF |
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| 15 | if AC_TRY_COMMAND(${CC-cc} -E conftest.c) | egrep yes >/dev/null 2>&1; then |
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| 16 | ac_cv_prog_gcc=yes |
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| 17 | else |
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| 18 | ac_cv_prog_gcc=no |
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| 19 | fi])]) |
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| 20 | |
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| 21 | AC_DEFUN([LIB_AM_PROG_AS], |
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| 22 | [# By default we simply use the C compiler to build assembly code. |
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| 23 | AC_REQUIRE([LIB_AC_PROG_CC]) |
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| 24 | test "${CCAS+set}" = set || CCAS=$CC |
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| 25 | test "${CCASFLAGS+set}" = set || CCASFLAGS=$CFLAGS |
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| 26 | AC_ARG_VAR([CCAS], [assembler compiler command (defaults to CC)]) |
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| 27 | AC_ARG_VAR([CCASFLAGS], [assembler compiler flags (defaults to CFLAGS)]) |
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| 28 | ]) |
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| 29 | |
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| 30 | AC_DEFUN([LIB_AC_PROG_CC], |
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| 31 | [AC_BEFORE([$0], [AC_PROG_CPP])dnl |
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| 32 | AC_CHECK_PROG(CC, gcc, gcc) |
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| 33 | _AM_DEPENDENCIES(CC) |
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| 34 | if test -z "$CC"; then |
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| 35 | AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc) |
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| 36 | test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH]) |
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| 37 | fi |
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| 38 | |
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| 39 | LIB_AC_PROG_CC_GNU |
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| 40 | |
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| 41 | if test $ac_cv_prog_gcc = yes; then |
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| 42 | GCC=yes |
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| 43 | dnl Check whether -g works, even if CFLAGS is set, in case the package |
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| 44 | dnl plays around with CFLAGS (such as to build both debugging and |
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| 45 | dnl normal versions of a library), tasteless as that idea is. |
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| 46 | ac_test_CFLAGS="${CFLAGS+set}" |
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| 47 | ac_save_CFLAGS="$CFLAGS" |
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| 48 | CFLAGS= |
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| 49 | _AC_PROG_CC_G |
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| 50 | if test "$ac_test_CFLAGS" = set; then |
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| 51 | CFLAGS="$ac_save_CFLAGS" |
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| 52 | elif test $ac_cv_prog_cc_g = yes; then |
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| 53 | CFLAGS="-g -O2" |
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| 54 | else |
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| 55 | CFLAGS="-O2" |
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| 56 | fi |
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| 57 | else |
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| 58 | GCC= |
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| 59 | test "${CFLAGS+set}" = set || CFLAGS="-g" |
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| 60 | fi |
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| 61 | ]) |
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| 62 | |
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