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 # See if we are building gcc with C++.
  21 # Do this early so setting lang to C++ affects following tests
  22 AC_ARG_ENABLE(build-with-cxx,
  23 [  --enable-build-with-cxx build with C++ compiler instead of C compiler],
  24 ENABLE_BUILD_WITH_CXX=$enableval,
  25 ENABLE_BUILD_WITH_CXX=no)
  26 AC_SUBST(ENABLE_BUILD_WITH_CXX)
  27
  28 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
  29 AC_CHECK_PROGS([ACLOCAL], [aclocal], [$MISSING aclocal])
  30 AC_CHECK_PROGS([AUTOCONF], [autoconf], [$MISSING autoconf])
  31 AC_CHECK_PROGS([AUTOHEADER], [autoheader], [$MISSING autoheader])
  32
  33 # Figure out what compiler warnings we can enable.
  34 # See config/warnings.m4 for details.
  35
  36 ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wno-narrowing -Wwrite-strings \
  37                           -Wmissing-format-attribute], [warn])
  38 ACX_PROG_CC_WARNING_OPTS([-Wstrict-prototypes -Wmissing-prototypes \
  39                           -Wold-style-definition -Wc++-compat], [c_warn])
  40 ACX_PROG_CC_WARNING_ALMOST_PEDANTIC([-Wno-long-long])
  41
  42 # Disable exceptions and RTTI if building with g++
  43 ACX_PROG_CC_WARNING_OPTS(
  44        m4_quote(m4_do([-fno-exceptions -fno-rtti])), [noexception_flags])
  45
  46 # Only enable with --enable-werror-always until existing warnings are
  47 # corrected.
  48 ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual])
  49
  50 # Dependency checking.
  51 ZW_CREATE_DEPDIR
  52 if test "$ENABLE_BUILD_WITH_CXX" = "no"; then
  53 ZW_PROG_COMPILER_DEPENDENCIES([CC])
  54 else
  55 AC_LANG_PUSH([C++])
  56 AC_COMPILE_IFELSE([[int i;]], [],
  57                   [AC_MSG_ERROR([C++ compiler missing or inoperational])])
  58 AC_LANG_POP([C++])
  59 ZW_PROG_COMPILER_DEPENDENCIES([CXX])
  60 fi
  61
  62 # Checks for header files.
  63 AC_HEADER_TIME
  64 ACX_HEADER_STRING
  65
  66 AC_CHECK_HEADERS(locale.h fcntl.h limits.h stddef.h \
  67         stdlib.h strings.h string.h sys/file.h unistd.h)
  68
  69 # Checks for typedefs, structures, and compiler characteristics.
  70 AC_C_BIGENDIAN
  71 AC_C_CONST
  72 AC_C_INLINE
  73 AC_FUNC_OBSTACK
  74 AC_TYPE_OFF_T
  75 AC_TYPE_SIZE_T
  76 AC_TYPE_SSIZE_T
  77 AC_TYPE_UINTPTR_T
  78 AC_CHECK_TYPE(ptrdiff_t, int)
  79 AC_STRUCT_TM
  80 AC_CHECK_SIZEOF(int)
  81 AC_CHECK_SIZEOF(long)
  82 define(libcpp_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
  83   ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
  84   fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
  85   fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
  86   putchar_unlocked putc_unlocked)
  87 AC_CHECK_FUNCS(libcpp_UNLOCKED_FUNCS)
  88 AC_CHECK_DECLS([abort, asprintf, basename(char *), errno, getopt, vasprintf])
  89 AC_CHECK_DECLS(m4_split(m4_normalize(libcpp_UNLOCKED_FUNCS)))
  90
  91 # Checks for library functions.
  92 AC_FUNC_ALLOCA
  93 AC_HEADER_STDC
  94 AM_LANGINFO_CODESET
  95 ZW_GNU_GETTEXT_SISTER_DIR
  96
  97 AC_CACHE_CHECK(for uchar, gcc_cv_type_uchar,
  98 [AC_TRY_COMPILE([
  99 #include <sys/types.h>
 100 ],
 101 [if ((uchar *)0) return 0;
 102  if (sizeof(uchar)) return 0;],
 103 ac_cv_type_uchar=yes, ac_cv_type_uchar=no)])
 104 if test $ac_cv_type_uchar = yes; then
 105   AC_DEFINE(HAVE_UCHAR, 1,
 106   [Define if <sys/types.h> defines \`uchar'.])
 107 fi
 108
 109 # g++ on Solaris 10+ defines _XOPEN_SOURCE=600, which exposes a different
 110 # iconv() prototype.
 111 AS_IF([test "$ENABLE_BUILD_WITH_CXX" = "yes"],
 112   [AC_LANG_PUSH([C++])
 113    AM_ICONV
 114    AC_LANG_POP([C++])],
 115   [AM_ICONV])
 116
 117 # More defines and substitutions.
 118 PACKAGE="$PACKAGE_TARNAME"
 119 AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE", [Define to the name of this package.])
 120 AC_SUBST(PACKAGE)
 121
 122 if test "x$enable_nls" != xno; then
 123   USED_CATALOGS='$(CATALOGS)'
 124 else
 125   USED_CATALOGS=
 126 fi
 127 AC_SUBST(USED_CATALOGS)
 128
 129 AC_ARG_ENABLE(maintainer-mode,
 130 [  --enable-maintainer-mode enable rules only needed by maintainers],,
 131 enable_maintainer_mode=no)
 132
 133 if test "x$enable_maintainer_mode" = xno; then
 134   MAINT='#'
 135 else
 136   MAINT=
 137 fi
 138 AC_SUBST(MAINT)
 139
 140 AC_ARG_ENABLE(checking,
 141 [  --enable-checking      enable expensive run-time checks],,
 142 enable_checking=no)
 143
 144 if test $enable_checking != no ; then
 145   AC_DEFINE(ENABLE_CHECKING, 1,
 146 [Define if you want more run-time sanity checks.])
 147 fi
 148
 149 m4_changequote(,)
 150 case $target in
 151         alpha*-*-* | \
 152         arm*-*-*eabi* | \
 153         arm*-*-symbianelf* | \
 154         x86_64-*-* | \
 155         ia64-*-* | \
 156         hppa*64*-*-* | \
 157         i[34567]86-*-* | x86_64-*-solaris2.1[0-9]* | \
 158         mips*-*-* | \
 159         mmix-*-* | \
 160         powerpc*-*-* | \
 161         rs6000*-*-* | \
 162         s390*-*-* | \
 163         sparc*-*-* | \
 164         spu-*-* | \
 165         sh[123456789lbe]*-*-* | sh-*-* | \
 166         tilegx-*-* | tilepro-*-* )
 167                 need_64bit_hwint=yes ;;
 168         *)
 169                 need_64bit_hwint=no ;;
 170 esac
 171
 172 case $need_64bit_hwint:$ac_cv_sizeof_long in
 173         *:8 | no:*) host_wide_int=long ;;
 174         *) host_wide_int='long long' ;;
 175 esac
 176 m4_changequote([,])
 177
 178 AC_DEFINE_UNQUOTED(HOST_WIDE_INT, $host_wide_int,
 179 [Define to the widest efficient host integer type at least
 180    as wide as the target's size_t type.])
 181
 182 case $target in
 183   i?86-* | x86_64-*)
 184     AC_TRY_COMPILE([], [asm ("pcmpestri %0, %%xmm0, %%xmm1" : : "i"(0))],
 185       [AC_DEFINE([HAVE_SSE4], [1],
 186                  [Define to 1 if you can assemble SSE4 insns.])])
 187 esac
 188
 189 # Output.
 190
 191 AC_CONFIG_HEADERS(config.h:config.in, [echo timestamp > stamp-h1])
 192 AC_CONFIG_FILES(Makefile)
 193 AC_OUTPUT