zlib/acinclude.m4

   1 # FIXME: We temporarily define our own version of AC_PROG_CC.  This is
   2 # copied from autoconf 2.12, but does not call AC_PROG_CC_WORKS.  We
   3 # are probably using a cross compiler, which will not be able to fully
   4 # link an executable.  This should really be fixed in autoconf
   5 # itself.
   6
   7 AC_DEFUN(LIB_AC_PROG_CC,
   8 [AC_BEFORE([$0], [AC_PROG_CPP])dnl
   9 dnl Fool anybody using AC_PROG_CC.
  10 AC_PROVIDE([AC_PROG_CC])
  11 AC_CHECK_PROG(CC, gcc, gcc)
  12 if test -z "$CC"; then
  13   AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
  14   test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
  15 fi
  16
  17 AC_PROG_CC_GNU
  18
  19 if test $ac_cv_prog_gcc = yes; then
  20   GCC=yes
  21 dnl Check whether -g works, even if CFLAGS is set, in case the package
  22 dnl plays around with CFLAGS (such as to build both debugging and
  23 dnl normal versions of a library), tasteless as that idea is.
  24   ac_test_CFLAGS="${CFLAGS+set}"
  25   ac_save_CFLAGS="$CFLAGS"
  26   CFLAGS=
  27   AC_PROG_CC_G
  28   if test "$ac_test_CFLAGS" = set; then
  29     CFLAGS="$ac_save_CFLAGS"
  30   elif test $ac_cv_prog_cc_g = yes; then
  31     CFLAGS="-g -O2"
  32   else
  33     CFLAGS="-O2"
  34   fi
  35 else
  36   GCC=
  37   test "${CFLAGS+set}" = set || CFLAGS="-g"
  38 fi
  39 ])
  40
  41 sinclude(../libtool.m4)
  42 dnl The lines below arrange for aclocal not to bring libtool.m4
  43 dnl AM_PROG_LIBTOOL into aclocal.m4, while still arranging for automake
  44 dnl to add a definition of LIBTOOL to Makefile.in.
  45 ifelse(yes,no,[
  46 AC_DEFUN([AM_PROG_LIBTOOL],)
  47 AC_SUBST(LIBTOOL)
  48 ])