1# Process this file with autoconf to produce a configure script. 2# Copyright (C) 1994-2018 Free Software Foundation, Inc. 3# Originally contributed by Dave Love (d.love@dl.ac.uk). 4# 5#This file is part of GCC. 6# 7#GCC is free software; you can redistribute it and/or modify 8#it under the terms of the GNU General Public License as published by 9#the Free Software Foundation; either version 3, or (at your option) 10#any later version. 11# 12#GCC is distributed in the hope that it will be useful, 13#but WITHOUT ANY WARRANTY; without even the implied warranty of 14#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15#GNU General Public License for more details. 16# 17#You should have received a copy of the GNU General Public License 18#along with GCC; see the file COPYING3. If not see 19#<http://www.gnu.org/licenses/>. 20 21AC_PREREQ(2.64) 22AC_INIT(package-unused, version-unused,, libobjc) 23AC_CONFIG_SRCDIR([objc/objc.h]) 24GCC_TOPLEV_SUBDIRS 25 26# We need the following definitions because AC_PROG_LIBTOOL relies on them 27PACKAGE=libobjc 28# Version is pulled out to make it a bit easier to change using sed. 29VERSION=4:0:0 30AC_SUBST(VERSION) 31 32# This works around the fact that libtool configuration may change LD 33# for this particular configuration, but some shells, instead of 34# keeping the changes in LD private, export them just because LD is 35# exported. 36ORIGINAL_LD_FOR_MULTILIBS=$LD 37 38# ------- 39# Options 40# ------- 41 42# We use these options to decide which functions to include. 43AC_ARG_WITH(target-subdir, 44[ --with-target-subdir=SUBDIR 45 configuring in a subdirectory]) 46AC_ARG_WITH(cross-host, 47[ --with-cross-host=HOST configuring with a cross compiler]) 48 49AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) 50AC_ARG_ENABLE(version-specific-runtime-libs, 51[ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ], 52[case "$enableval" in 53 yes) version_specific_libs=yes ;; 54 no) version_specific_libs=no ;; 55 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; 56 esac], 57[version_specific_libs=no]) 58AC_MSG_RESULT($version_specific_libs) 59 60# ----------- 61# Directories 62# ----------- 63 64# Find the rest of the source tree framework. 65AM_ENABLE_MULTILIB(, ..) 66 67AC_CANONICAL_SYSTEM 68ACX_NONCANONICAL_TARGET 69 70# Export source directory. 71# These need to be absolute paths, yet at the same time need to 72# canonicalize only relative paths, because then amd will not unmount 73# drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd. 74case $srcdir in 75 [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;; 76 *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;; 77esac 78AC_SUBST(glibcpp_srcdir) 79 80# Calculate toolexeclibdir 81# Also toolexecdir, though it's only used in toolexeclibdir 82case ${version_specific_libs} in 83 yes) 84 # Need the gcc compiler version to know where to install libraries 85 # and header files if --enable-version-specific-runtime-libs option 86 # is selected. 87 toolexecdir='$(libdir)/gcc/$(target_noncanonical)' 88 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)' 89 ;; 90 no) 91 if test -n "$with_cross_host" && 92 test x"$with_cross_host" != x"no"; then 93 # Install a library built with a cross compiler in tooldir, not libdir. 94 toolexecdir='$(exec_prefix)/$(target_noncanonical)' 95 toolexeclibdir='$(toolexecdir)/lib' 96 else 97 toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)' 98 toolexeclibdir='$(libdir)' 99 fi 100 multi_os_directory=`$CC -print-multi-os-directory` 101 case $multi_os_directory in 102 .) ;; # Avoid trailing /. 103 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; 104 esac 105 ;; 106esac 107AC_SUBST(toolexecdir) 108AC_SUBST(toolexeclibdir) 109 110# Figure out if we want to name the include directory and the 111# library name changes differently. 112includedirname=include 113libsuffix= 114case "${host}" in 115 *-darwin*) 116 # Darwin is the only target so far that needs a different include directory. 117 includedirname=include-gnu-runtime 118 libsuffix=-gnu 119 ;; 120esac 121AC_SUBST(includedirname) 122AC_SUBST(libsuffix) 123 124AC_CONFIG_HEADERS(config.h) 125 126# -------- 127# Programs 128# -------- 129 130GCC_NO_EXECUTABLES 131 132# We must force CC to /not/ be a precious variable; otherwise 133# the wrong, non-multilib-adjusted value will be used in multilibs. 134# As a side effect, we have to subst CFLAGS ourselves. 135m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) 136m4_define([_AC_ARG_VAR_PRECIOUS],[]) 137AC_PROG_CC 138m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) 139 140# extra LD Flags which are required for targets 141ACX_LT_HOST_FLAGS 142case "${host}" in 143 *-darwin*) 144 # Darwin needs -single_module when linking libobjc 145 extra_ldflags_libobjc='$(lt_host_flags) -Wl,-single_module' 146 ;; 147 *-cygwin*|*-mingw*) 148 # Tell libtool to build DLLs on Windows 149 extra_ldflags_libobjc='$(lt_host_flags)' 150 ;; 151esac 152AC_SUBST(extra_ldflags_libobjc) 153 154# Add CET specific flags if CET is enabled 155GCC_CET_FLAGS(CET_FLAGS) 156XCFLAGS="$XCFLAGS $CET_FLAGS" 157 158AC_SUBST(CFLAGS) 159AC_SUBST(XCFLAGS) 160 161AC_CHECK_TOOL(AS, as) 162AC_CHECK_TOOL(AR, ar) 163AC_CHECK_TOOL(RANLIB, ranlib, :) 164AC_PROG_INSTALL 165 166AM_MAINTAINER_MODE 167 168# Enable Win32 DLL on MS Windows - FIXME 169AC_LIBTOOL_WIN32_DLL 170 171AC_PROG_LIBTOOL 172 173AM_PROG_CC_C_O 174 175AC_PROG_MAKE_SET 176 177# ------- 178# Headers 179# ------- 180 181# Sanity check for the cross-compilation case: 182AC_CHECK_HEADER(stdio.h,:, 183 [AC_MSG_ERROR([Can't find stdio.h. 184You must have a usable C system for the target already installed, at least 185including headers and, preferably, the library, before you can configure 186the Objective C runtime system. If necessary, install gcc now with 187\`LANGUAGES=c', then the target library, then build with \`LANGUAGES=objc'.])]) 188 189AC_HEADER_STDC 190 191AC_CHECK_HEADERS(sched.h) 192 193# ----------- 194# Miscellanea 195# ----------- 196 197# Check if we have thread-local storage 198GCC_CHECK_TLS 199 200gt_BITFIELD_TYPE_MATTERS 201 202# ----------- 203# boehm-gc 204# ----------- 205 206AC_ARG_ENABLE(objc-gc, 207[AS_HELP_STRING([--enable-objc-gc], 208 [enable use of Boehm's garbage collector with the 209 GNU Objective-C runtime])],,enable_objc_gc=no) 210AC_ARG_WITH([target-bdw-gc], 211[AS_HELP_STRING([--with-target-bdw-gc=PATHLIST], 212 [specify prefix directory for installed bdw-gc package. 213 Equivalent to --with-target-bdw-gc-include=PATH/include 214 plus --with-target-bdw-gc-lib=PATH/lib])]) 215AC_ARG_WITH([target-bdw-gc-include], 216[AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST], 217 [specify directories for installed bdw-gc include files])]) 218AC_ARG_WITH([target-bdw-gc-lib], 219[AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST], 220 [specify directories for installed bdw-gc library])]) 221 222case "$enable_objc_gc" in 223no) 224 use_bdw_gc=no 225 ;; 226*) 227 AC_MSG_CHECKING([for bdw garbage collector]) 228 if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then 229 dnl no bdw-gw options, assuming bdw-gc in default locations 230 BDW_GC_CFLAGS= 231 BDW_GC_LIBS="-lgc" 232 else 233 dnl bdw-gw options passed by configure flags 234 if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then 235 AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing]) 236 elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then 237 AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing]) 238 else 239 AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options]) 240 fi 241 mldir=`${CC-gcc} --print-multi-directory 2>/dev/null` 242 bdw_val= 243 if test "x$with_target_bdw_gc" != x; then 244 for i in `echo $with_target_bdw_gc | tr ',' ' '`; do 245 case "$i" in 246 *=*) sd=${i%%=*}; d=${i#*=} ;; 247 *) sd=.; d=$i ;; 248 esac 249 if test "$mldir" = "$sd"; then 250 bdw_val=$d 251 fi 252 done 253 if test "x$bdw_val" = x; then 254 AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc]) 255 fi 256 bdw_inc_dir="$bdw_val/include" 257 bdw_lib_dir="$bdw_val/lib" 258 fi 259 bdw_val= 260 if test "x$with_target_bdw_gc_include" != x; then 261 for i in `echo $with_target_bdw_gc_include | tr ',' ' '`; do 262 case "$i" in 263 *=*) sd=${i%%=*}; d=${i#*=} ;; 264 *) sd=.; d=$i; fallback=$i ;; 265 esac 266 if test "$mldir" = "$sd"; then 267 bdw_val=$d 268 fi 269 done 270 if test "x$bdw_val" = x && test "x$bdw_inc_dir" = x && test "x$fallback" != x; then 271 bdw_inc_dir="$fallback" 272 elif test "x$bdw_val" = x; then 273 AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-include]) 274 else 275 bdw_inc_dir="$bdw_val" 276 fi 277 fi 278 bdw_val= 279 if test "x$with_target_bdw_gc_lib" != x; then 280 for i in `echo $with_target_bdw_gc_lib | tr ',' ' '`; do 281 case "$i" in 282 *=*) sd=${i%%=*}; d=${i#*=} ;; 283 *) sd=.; d=$i ;; 284 esac 285 if test "$mldir" = "$sd"; then 286 bdw_val=$d 287 fi 288 done 289 if test "x$bdw_val" = x; then 290 AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-lib]) 291 fi 292 bdw_lib_dir="$bdw_val" 293 fi 294 if test "x$bdw_inc_dir" = x; then 295 AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-include]) 296 fi 297 if test "x$bdw_lib_dir" = x; then 298 AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-lib]) 299 fi 300 BDW_GC_CFLAGS="-I$bdw_inc_dir" 301 if test -f $bdw_lib_dir/libgc.la; then 302 BDW_GC_LIBS="$bdw_lib_dir/libgc.la" 303 else 304 BDW_GC_LIBS="-L$bdw_lib_dir -lgc" 305 fi 306 AC_MSG_RESULT([found]) 307 fi 308 309 case "$BDW_GC_LIBS" in 310 *libgc.la) 311 use_bdw_gc=yes 312 ;; 313 *) 314 AC_MSG_CHECKING([for system boehm-gc]) 315 save_CFLAGS=$CFLAGS 316 save_LIBS=$LIBS 317 CFLAGS="$CFLAGS $BDW_GC_CFLAGS" 318 LIBS="$LIBS $BDW_GC_LIBS" 319 dnl the link test is not good enough for ARM32 multilib detection, 320 dnl first check to link, then to run 321 AC_LINK_IFELSE( 322 [AC_LANG_PROGRAM([#include <gc/gc.h>],[GC_init()])], 323 [ 324 AC_RUN_IFELSE([AC_LANG_SOURCE([[ 325 #include <gc/gc.h> 326 int main() { 327 GC_init(); 328 return 0; 329 } 330 ]])], 331 [system_bdw_gc_found=yes], 332 [system_bdw_gc_found=no], 333 dnl assume no system boehm-gc for cross builds ... 334 [system_bdw_gc_found=no] 335 ) 336 ], 337 [system_bdw_gc_found=no]) 338 CFLAGS=$save_CFLAGS 339 LIBS=$save_LIBS 340 if test x$enable_objc_gc = xauto && test x$system_bdw_gc_found = xno; then 341 AC_MSG_WARN([system bdw-gc not found, not building libobjc_gc]) 342 use_bdw_gc=no 343 elif test x$enable_objc_gc = xyes && test x$system_bdw_gc_found = xno; then 344 AC_MSG_ERROR([system bdw-gc required but not found]) 345 else 346 use_bdw_gc=yes 347 AC_MSG_RESULT([found]) 348 fi 349 esac 350esac 351 352if test "$use_bdw_gc" = no; then 353 OBJC_GCFLAGS='' 354 OBJC_BOEHM_GC='' 355 OBJC_BOEHM_GC_INCLUDES='' 356 OBJC_BOEHM_GC_LIBS='' 357else 358 OBJC_GCFLAGS='-DOBJC_WITH_GC=1' 359 OBJC_BOEHM_GC='libobjc_gc$(libsuffix).la' 360 OBJC_BOEHM_GC_INCLUDES=$BDW_GC_CFLAGS 361 OBJC_BOEHM_GC_LIBS=$BDW_GC_LIBS 362fi 363AC_SUBST(OBJC_GCFLAGS) 364AC_SUBST(OBJC_BOEHM_GC) 365AC_SUBST(OBJC_BOEHM_GC_INCLUDES) 366AC_SUBST(OBJC_BOEHM_GC_LIBS) 367 368# Determine what GCC version number to use in filesystem paths. 369GCC_BASE_VER 370 371# ------ 372# Output 373# ------ 374 375if test ${multilib} = yes; then 376 multilib_arg="--enable-multilib" 377else 378 multilib_arg= 379fi 380 381AC_CONFIG_FILES([Makefile]) 382AC_OUTPUT 383