libcpp/configure.ac

   1 #                                               -*- Autoconf -*-
   2 # Process this file with autoconf to produce a configure script.
   3
   4 AC_PREREQ(2.64)
   5 AC_INIT(cpplib, [ ], gcc-bugs@gcc.gnu.org, cpplib)
   6 AC_CONFIG_SRCDIR(ucnid.h)
   7 AC_CONFIG_MACRO_DIR(../config)
   8 AC_CANONICAL_SYSTEM
   9
  10 # Checks for programs.
  11 AC_PROG_MAKE_SET
  12 AC_PROG_INSTALL
  13 AC_PROG_CC
  14 AC_PROG_CXX
  15 AC_PROG_RANLIB
  16
  17 AC_USE_SYSTEM_EXTENSIONS
  18 AC_SYS_LARGEFILE
  19
  20 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
  21 AC_CHECK_PROGS([ACLOCAL], [aclocal], [$MISSING aclocal])
  22 AC_CHECK_PROGS([AUTOCONF], [autoconf], [$MISSING autoconf])
  23 AC_CHECK_PROGS([AUTOHEADER], [autoheader], [$MISSING autoheader])
  24
  25 # Figure out what compiler warnings we can enable.
  26 # See config/warnings.m4 for details.
  27
  28 ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wno-narrowing -Wwrite-strings \
  29                           -Wmissing-format-attribute], [warn])
  30 ACX_PROG_CC_WARNING_OPTS([-Wstrict-prototypes -Wmissing-prototypes \
  31                           -Wold-style-definition -Wc++-compat], [c_warn])
  32 ACX_PROG_CC_WARNING_ALMOST_PEDANTIC([-Wno-long-long])
  33
  34 # Disable exceptions and RTTI if building with g++
  35 ACX_PROG_CC_WARNING_OPTS(
  36        m4_quote(m4_do([-fno-exceptions -fno-rtti])), [noexception_flags])
  37
  38 # Only enable with --enable-werror-always until existing warnings are
  39 # corrected.
  40 ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual])
  41
  42 # Dependency checking.
  43 ZW_CREATE_DEPDIR
  44 AC_LANG_PUSH([C++])
  45 AC_COMPILE_IFELSE([[int i;]], [],
  46                   [AC_MSG_ERROR([C++ compiler missing or inoperational])])
  47 AC_LANG_POP([C++])
  48 ZW_PROG_COMPILER_DEPENDENCIES([CXX])
  49
  50 # Checks for header files.
  51 AC_HEADER_TIME
  52 ACX_HEADER_STRING
  53
  54 AC_CHECK_HEADERS(locale.h fcntl.h limits.h stddef.h \
  55         stdlib.h strings.h string.h sys/file.h unistd.h)
  56
  57 # Checks for typedefs, structures, and compiler characteristics.
  58 AC_C_BIGENDIAN
  59 AC_C_CONST
  60 AC_C_INLINE
  61 AC_FUNC_OBSTACK
  62 AC_TYPE_OFF_T
  63 AC_TYPE_SIZE_T
  64 AC_TYPE_SSIZE_T
  65 AC_TYPE_UINTPTR_T
  66 AC_CHECK_TYPE(ptrdiff_t, int)
  67 AC_STRUCT_TM
  68 AC_CHECK_SIZEOF(int)
  69 AC_CHECK_SIZEOF(long)
  70 define(libcpp_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
  71   ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
  72   fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
  73   fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
  74   putchar_unlocked putc_unlocked)
  75 AC_CHECK_FUNCS(libcpp_UNLOCKED_FUNCS)
  76 AC_CHECK_DECLS([abort, asprintf, basename(char *), errno, getopt, vasprintf])
  77 AC_CHECK_DECLS(m4_split(m4_normalize(libcpp_UNLOCKED_FUNCS)))
  78
  79 # Checks for library functions.
  80 AC_FUNC_ALLOCA
  81 AC_HEADER_STDC
  82 AM_LANGINFO_CODESET
  83 ZW_GNU_GETTEXT_SISTER_DIR
  84
  85 AC_CACHE_CHECK(for uchar, gcc_cv_type_uchar,
  86 [AC_TRY_COMPILE([
  87 #include <sys/types.h>
  88 ],
  89 [if ((uchar *)0) return 0;
  90  if (sizeof(uchar)) return 0;],
  91 ac_cv_type_uchar=yes, ac_cv_type_uchar=no)])
  92 if test $ac_cv_type_uchar = yes; then
  93   AC_DEFINE(HAVE_UCHAR, 1,
  94   [Define if <sys/types.h> defines \`uchar'.])
  95 fi
  96
  97 # g++ on Solaris 10+ defines _XOPEN_SOURCE=600, which exposes a different
  98 # iconv() prototype.
  99 AC_LANG_PUSH([C++])
 100 AM_ICONV
 101 AC_LANG_POP([C++])
 102
 103 # More defines and substitutions.
 104 PACKAGE="$PACKAGE_TARNAME"
 105 AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE", [Define to the name of this package.])
 106 AC_SUBST(PACKAGE)
 107
 108 if test "x$enable_nls" != xno; then
 109   USED_CATALOGS='$(CATALOGS)'
 110 else
 111   USED_CATALOGS=
 112 fi
 113 AC_SUBST(USED_CATALOGS)
 114
 115 AC_ARG_ENABLE(maintainer-mode,
 116 [  --enable-maintainer-mode enable rules only needed by maintainers],,
 117 enable_maintainer_mode=no)
 118
 119 if test "x$enable_maintainer_mode" = xno; then
 120   MAINT='#'
 121 else
 122   MAINT=
 123 fi
 124 AC_SUBST(MAINT)
 125
 126 AC_ARG_ENABLE(checking,
 127 [  --enable-checking      enable expensive run-time checks],,
 128 enable_checking=no)
 129
 130 if test $enable_checking != no ; then
 131   AC_DEFINE(ENABLE_CHECKING, 1,
 132 [Define if you want more run-time sanity checks.])
 133 fi
 134
 135 m4_changequote(,)
 136 case $target in
 137         aarch64*-*-* | \
 138         alpha*-*-* | \
 139         arm*-*-*eabi* | \
 140         arm*-*-symbianelf* | \
 141         x86_64-*-* | \
 142         ia64-*-* | \
 143         hppa*64*-*-* | \
 144         i[34567]86-*-* | x86_64-*-solaris2.1[0-9]* | \
 145         mips*-*-* | \
 146         mmix-*-* | \
 147         powerpc*-*-* | \
 148         rs6000*-*-* | \
 149         s390*-*-* | \
 150         sparc*-*-* | \
 151         spu-*-* | \
 152         sh[123456789lbe]*-*-* | sh-*-* | \
 153         tilegx-*-* | tilepro-*-* )
 154                 need_64bit_hwint=yes ;;
 155         *)
 156                 need_64bit_hwint=no ;;
 157 esac
 158
 159 case $need_64bit_hwint:$ac_cv_sizeof_long in
 160         *:8 | no:*) host_wide_int=long ;;
 161         *) host_wide_int='long long' ;;
 162 esac
 163 m4_changequote([,])
 164
 165 AC_DEFINE_UNQUOTED(HOST_WIDE_INT, $host_wide_int,
 166 [Define to the widest efficient host integer type at least
 167    as wide as the target's size_t type.])
 168
 169 case $target in
 170   i?86-* | x86_64-*)
 171     AC_TRY_COMPILE([], [asm ("pcmpestri %0, %%xmm0, %%xmm1" : : "i"(0))],
 172       [AC_DEFINE([HAVE_SSE4], [1],
 173                  [Define to 1 if you can assemble SSE4 insns.])])
 174 esac
 175
 176 # Output.
 177
 178 AC_CONFIG_HEADERS(config.h:config.in, [echo timestamp > stamp-h1])
 179 AC_CONFIG_FILES(Makefile)
 180 AC_OUTPUT