Thu, 03 Apr 2014 09:34:43 -0700
8036767: PPC64: Support for little endian execution model
Reviewed-by: ihse, erikj, simonis
Contributed-by: asmundak@google.com
1 #
2 # Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
3 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 #
5 # This code is free software; you can redistribute it and/or modify it
6 # under the terms of the GNU General Public License version 2 only, as
7 # published by the Free Software Foundation. Oracle designates this
8 # particular file as subject to the "Classpath" exception as provided
9 # by Oracle in the LICENSE file that accompanied this code.
10 #
11 # This code is distributed in the hope that it will be useful, but WITHOUT
12 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 # version 2 for more details (a copy is included in the LICENSE file that
15 # accompanied this code).
16 #
17 # You should have received a copy of the GNU General Public License version
18 # 2 along with this work; if not, write to the Free Software Foundation,
19 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 #
21 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 # or visit www.oracle.com if you need additional information or have any
23 # questions.
24 #
26 # Support macro for PLATFORM_EXTRACT_TARGET_AND_BUILD.
27 # Converts autoconf style CPU name to OpenJDK style, into
28 # VAR_CPU, VAR_CPU_ARCH, VAR_CPU_BITS and VAR_CPU_ENDIAN.
29 AC_DEFUN([PLATFORM_EXTRACT_VARS_FROM_CPU],
30 [
31 # First argument is the cpu name from the trip/quad
32 case "$1" in
33 x86_64)
34 VAR_CPU=x86_64
35 VAR_CPU_ARCH=x86
36 VAR_CPU_BITS=64
37 VAR_CPU_ENDIAN=little
38 ;;
39 i?86)
40 VAR_CPU=x86
41 VAR_CPU_ARCH=x86
42 VAR_CPU_BITS=32
43 VAR_CPU_ENDIAN=little
44 ;;
45 arm*)
46 VAR_CPU=arm
47 VAR_CPU_ARCH=arm
48 VAR_CPU_BITS=32
49 VAR_CPU_ENDIAN=little
50 ;;
51 powerpc)
52 VAR_CPU=ppc
53 VAR_CPU_ARCH=ppc
54 VAR_CPU_BITS=32
55 VAR_CPU_ENDIAN=big
56 ;;
57 powerpc64)
58 VAR_CPU=ppc64
59 VAR_CPU_ARCH=ppc
60 VAR_CPU_BITS=64
61 VAR_CPU_ENDIAN=big
62 ;;
63 powerpc64le)
64 VAR_CPU=ppc64
65 VAR_CPU_ARCH=ppc
66 VAR_CPU_BITS=64
67 VAR_CPU_ENDIAN=little
68 ;;
69 s390)
70 VAR_CPU=s390
71 VAR_CPU_ARCH=s390
72 VAR_CPU_BITS=32
73 VAR_CPU_ENDIAN=big
74 ;;
75 s390x)
76 VAR_CPU=s390x
77 VAR_CPU_ARCH=s390
78 VAR_CPU_BITS=64
79 VAR_CPU_ENDIAN=big
80 ;;
81 sparc)
82 VAR_CPU=sparc
83 VAR_CPU_ARCH=sparc
84 VAR_CPU_BITS=32
85 VAR_CPU_ENDIAN=big
86 ;;
87 sparcv9)
88 VAR_CPU=sparcv9
89 VAR_CPU_ARCH=sparc
90 VAR_CPU_BITS=64
91 VAR_CPU_ENDIAN=big
92 ;;
93 *)
94 AC_MSG_ERROR([unsupported cpu $1])
95 ;;
96 esac
97 ])
99 # Support macro for PLATFORM_EXTRACT_TARGET_AND_BUILD.
100 # Converts autoconf style OS name to OpenJDK style, into
101 # VAR_OS and VAR_OS_API.
102 AC_DEFUN([PLATFORM_EXTRACT_VARS_FROM_OS],
103 [
104 case "$1" in
105 *linux*)
106 VAR_OS=linux
107 VAR_OS_API=posix
108 VAR_OS_ENV=linux
109 ;;
110 *solaris*)
111 VAR_OS=solaris
112 VAR_OS_API=posix
113 VAR_OS_ENV=solaris
114 ;;
115 *darwin*)
116 VAR_OS=macosx
117 VAR_OS_API=posix
118 VAR_OS_ENV=macosx
119 ;;
120 *bsd*)
121 VAR_OS=bsd
122 VAR_OS_API=posix
123 VAR_OS_ENV=bsd
124 ;;
125 *cygwin*)
126 VAR_OS=windows
127 VAR_OS_API=winapi
128 VAR_OS_ENV=windows.cygwin
129 ;;
130 *mingw*)
131 VAR_OS=windows
132 VAR_OS_API=winapi
133 VAR_OS_ENV=windows.msys
134 ;;
135 *aix*)
136 VAR_OS=aix
137 VAR_OS_API=posix
138 VAR_OS_ENV=aix
139 ;;
140 *)
141 AC_MSG_ERROR([unsupported operating system $1])
142 ;;
143 esac
144 ])
146 # Expects $host_os $host_cpu $build_os and $build_cpu
147 # and $with_target_bits to have been setup!
148 #
149 # Translate the standard triplet(quadruplet) definition
150 # of the target/build system into OPENJDK_TARGET_OS, OPENJDK_TARGET_CPU,
151 # OPENJDK_BUILD_OS, etc.
152 AC_DEFUN([PLATFORM_EXTRACT_TARGET_AND_BUILD],
153 [
154 # Copy the autoconf trip/quadruplet verbatim to OPENJDK_TARGET_AUTOCONF_NAME
155 # (from the autoconf "host") and OPENJDK_BUILD_AUTOCONF_NAME
156 # Note that we might later on rewrite e.g. OPENJDK_TARGET_CPU due to reduced build,
157 # but this will not change the value of OPENJDK_TARGET_AUTOCONF_NAME.
158 OPENJDK_TARGET_AUTOCONF_NAME="$host"
159 OPENJDK_BUILD_AUTOCONF_NAME="$build"
160 AC_SUBST(OPENJDK_TARGET_AUTOCONF_NAME)
161 AC_SUBST(OPENJDK_BUILD_AUTOCONF_NAME)
163 # Convert the autoconf OS/CPU value to our own data, into the VAR_OS/CPU variables.
164 PLATFORM_EXTRACT_VARS_FROM_OS($build_os)
165 PLATFORM_EXTRACT_VARS_FROM_CPU($build_cpu)
166 # ..and setup our own variables. (Do this explicitely to facilitate searching)
167 OPENJDK_BUILD_OS="$VAR_OS"
168 OPENJDK_BUILD_OS_API="$VAR_OS_API"
169 OPENJDK_BUILD_OS_ENV="$VAR_OS_ENV"
170 OPENJDK_BUILD_CPU="$VAR_CPU"
171 OPENJDK_BUILD_CPU_ARCH="$VAR_CPU_ARCH"
172 OPENJDK_BUILD_CPU_BITS="$VAR_CPU_BITS"
173 OPENJDK_BUILD_CPU_ENDIAN="$VAR_CPU_ENDIAN"
174 AC_SUBST(OPENJDK_BUILD_OS)
175 AC_SUBST(OPENJDK_BUILD_OS_API)
176 AC_SUBST(OPENJDK_BUILD_CPU)
177 AC_SUBST(OPENJDK_BUILD_CPU_ARCH)
178 AC_SUBST(OPENJDK_BUILD_CPU_BITS)
179 AC_SUBST(OPENJDK_BUILD_CPU_ENDIAN)
181 AC_MSG_CHECKING([openjdk-build os-cpu])
182 AC_MSG_RESULT([$OPENJDK_BUILD_OS-$OPENJDK_BUILD_CPU])
184 # Convert the autoconf OS/CPU value to our own data, into the VAR_OS/CPU variables.
185 PLATFORM_EXTRACT_VARS_FROM_OS($host_os)
186 PLATFORM_EXTRACT_VARS_FROM_CPU($host_cpu)
187 # ... and setup our own variables. (Do this explicitely to facilitate searching)
188 OPENJDK_TARGET_OS="$VAR_OS"
189 OPENJDK_TARGET_OS_API="$VAR_OS_API"
190 OPENJDK_TARGET_OS_ENV="$VAR_OS_ENV"
191 OPENJDK_TARGET_CPU="$VAR_CPU"
192 OPENJDK_TARGET_CPU_ARCH="$VAR_CPU_ARCH"
193 OPENJDK_TARGET_CPU_BITS="$VAR_CPU_BITS"
194 OPENJDK_TARGET_CPU_ENDIAN="$VAR_CPU_ENDIAN"
195 AC_SUBST(OPENJDK_TARGET_OS)
196 AC_SUBST(OPENJDK_TARGET_OS_API)
197 AC_SUBST(OPENJDK_TARGET_CPU)
198 AC_SUBST(OPENJDK_TARGET_CPU_ARCH)
199 AC_SUBST(OPENJDK_TARGET_CPU_BITS)
200 AC_SUBST(OPENJDK_TARGET_CPU_ENDIAN)
202 AC_MSG_CHECKING([openjdk-target os-cpu])
203 AC_MSG_RESULT([$OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU])
204 ])
206 # Check if a reduced build (32-bit on 64-bit platforms) is requested, and modify behaviour
207 # accordingly. Must be done after setting up build and target system, but before
208 # doing anything else with these values.
209 AC_DEFUN([PLATFORM_SETUP_TARGET_CPU_BITS],
210 [
211 AC_ARG_WITH(target-bits, [AS_HELP_STRING([--with-target-bits],
212 [build 32-bit or 64-bit binaries (for platforms that support it), e.g. --with-target-bits=32 @<:@guessed@:>@])])
214 # We have three types of compiles:
215 # native == normal compilation, target system == build system
216 # cross == traditional cross compilation, target system != build system; special toolchain needed
217 # reduced == using native compilers, but with special flags (e.g. -m32) to produce 32-bit builds on 64-bit machines
218 #
219 if test "x$OPENJDK_BUILD_AUTOCONF_NAME" != "x$OPENJDK_TARGET_AUTOCONF_NAME"; then
220 # We're doing a proper cross-compilation
221 COMPILE_TYPE="cross"
222 else
223 COMPILE_TYPE="native"
224 fi
226 if test "x$with_target_bits" != x; then
227 if test "x$COMPILE_TYPE" = "xcross"; then
228 AC_MSG_ERROR([It is not possible to combine --with-target-bits=X and proper cross-compilation. Choose either.])
229 fi
231 if test "x$with_target_bits" = x32 && test "x$OPENJDK_TARGET_CPU_BITS" = x64; then
232 # A reduced build is requested
233 COMPILE_TYPE="reduced"
234 OPENJDK_TARGET_CPU_BITS=32
235 if test "x$OPENJDK_TARGET_CPU_ARCH" = "xx86"; then
236 OPENJDK_TARGET_CPU=x86
237 elif test "x$OPENJDK_TARGET_CPU_ARCH" = "xsparc"; then
238 OPENJDK_TARGET_CPU=sparc
239 else
240 AC_MSG_ERROR([Reduced build (--with-target-bits=32) is only supported on x86_64 and sparcv9])
241 fi
242 elif test "x$with_target_bits" = x64 && test "x$OPENJDK_TARGET_CPU_BITS" = x32; then
243 AC_MSG_ERROR([It is not possible to use --with-target-bits=64 on a 32 bit system. Use proper cross-compilation instead.])
244 elif test "x$with_target_bits" = "x$OPENJDK_TARGET_CPU_BITS"; then
245 AC_MSG_NOTICE([--with-target-bits are set to build platform address size; argument has no meaning])
246 else
247 AC_MSG_ERROR([--with-target-bits can only be 32 or 64, you specified $with_target_bits!])
248 fi
249 fi
250 AC_SUBST(COMPILE_TYPE)
252 AC_MSG_CHECKING([compilation type])
253 AC_MSG_RESULT([$COMPILE_TYPE])
254 ])
256 # Setup the legacy variables, for controlling the old makefiles.
257 #
258 AC_DEFUN([PLATFORM_SETUP_LEGACY_VARS],
259 [
260 # Also store the legacy naming of the cpu.
261 # Ie i586 and amd64 instead of x86 and x86_64
262 OPENJDK_TARGET_CPU_LEGACY="$OPENJDK_TARGET_CPU"
263 if test "x$OPENJDK_TARGET_CPU" = xx86; then
264 OPENJDK_TARGET_CPU_LEGACY="i586"
265 elif test "x$OPENJDK_TARGET_OS" != xmacosx && test "x$OPENJDK_TARGET_CPU" = xx86_64; then
266 # On all platforms except MacOSX replace x86_64 with amd64.
267 OPENJDK_TARGET_CPU_LEGACY="amd64"
268 fi
269 AC_SUBST(OPENJDK_TARGET_CPU_LEGACY)
271 # And the second legacy naming of the cpu.
272 # Ie i386 and amd64 instead of x86 and x86_64.
273 OPENJDK_TARGET_CPU_LEGACY_LIB="$OPENJDK_TARGET_CPU"
274 if test "x$OPENJDK_TARGET_CPU" = xx86; then
275 OPENJDK_TARGET_CPU_LEGACY_LIB="i386"
276 elif test "x$OPENJDK_TARGET_CPU" = xx86_64; then
277 OPENJDK_TARGET_CPU_LEGACY_LIB="amd64"
278 fi
279 AC_SUBST(OPENJDK_TARGET_CPU_LEGACY_LIB)
281 # This is the name of the cpu (but using i386 and amd64 instead of
282 # x86 and x86_64, respectively), preceeded by a /, to be used when
283 # locating libraries. On macosx, it's empty, though.
284 OPENJDK_TARGET_CPU_LIBDIR="/$OPENJDK_TARGET_CPU_LEGACY_LIB"
285 if test "x$OPENJDK_TARGET_OS" = xmacosx; then
286 OPENJDK_TARGET_CPU_LIBDIR=""
287 fi
288 AC_SUBST(OPENJDK_TARGET_CPU_LIBDIR)
290 # OPENJDK_TARGET_CPU_ISADIR is normally empty. On 64-bit Solaris systems, it is set to
291 # /amd64 or /sparcv9. This string is appended to some library paths, like this:
292 # /usr/lib${OPENJDK_TARGET_CPU_ISADIR}/libexample.so
293 OPENJDK_TARGET_CPU_ISADIR=""
294 if test "x$OPENJDK_TARGET_OS" = xsolaris; then
295 if test "x$OPENJDK_TARGET_CPU" = xx86_64; then
296 OPENJDK_TARGET_CPU_ISADIR="/amd64"
297 elif test "x$OPENJDK_TARGET_CPU" = xsparcv9; then
298 OPENJDK_TARGET_CPU_ISADIR="/sparcv9"
299 fi
300 fi
301 AC_SUBST(OPENJDK_TARGET_CPU_ISADIR)
303 # Setup OPENJDK_TARGET_CPU_OSARCH, which is used to set the os.arch Java system property
304 OPENJDK_TARGET_CPU_OSARCH="$OPENJDK_TARGET_CPU"
305 if test "x$OPENJDK_TARGET_OS" = xlinux && test "x$OPENJDK_TARGET_CPU" = xx86; then
306 # On linux only, we replace x86 with i386.
307 OPENJDK_TARGET_CPU_OSARCH="i386"
308 elif test "x$OPENJDK_TARGET_OS" != xmacosx && test "x$OPENJDK_TARGET_CPU" = xx86_64; then
309 # On all platforms except macosx, we replace x86_64 with amd64.
310 OPENJDK_TARGET_CPU_OSARCH="amd64"
311 fi
312 AC_SUBST(OPENJDK_TARGET_CPU_OSARCH)
314 OPENJDK_TARGET_CPU_JLI="$OPENJDK_TARGET_CPU"
315 if test "x$OPENJDK_TARGET_CPU" = xx86; then
316 OPENJDK_TARGET_CPU_JLI="i386"
317 elif test "x$OPENJDK_TARGET_OS" != xmacosx && test "x$OPENJDK_TARGET_CPU" = xx86_64; then
318 # On all platforms except macosx, we replace x86_64 with amd64.
319 OPENJDK_TARGET_CPU_JLI="amd64"
320 fi
321 # Now setup the -D flags for building libjli.
322 OPENJDK_TARGET_CPU_JLI_CFLAGS="-DLIBARCHNAME='\"$OPENJDK_TARGET_CPU_JLI\"'"
323 if test "x$OPENJDK_TARGET_OS" = xsolaris; then
324 if test "x$OPENJDK_TARGET_CPU_ARCH" = xsparc; then
325 OPENJDK_TARGET_CPU_JLI_CFLAGS="$OPENJDK_TARGET_CPU_JLI_CFLAGS -DLIBARCH32NAME='\"sparc\"' -DLIBARCH64NAME='\"sparcv9\"'"
326 elif test "x$OPENJDK_TARGET_CPU_ARCH" = xx86; then
327 OPENJDK_TARGET_CPU_JLI_CFLAGS="$OPENJDK_TARGET_CPU_JLI_CFLAGS -DLIBARCH32NAME='\"i386\"' -DLIBARCH64NAME='\"amd64\"'"
328 fi
329 fi
330 AC_SUBST(OPENJDK_TARGET_CPU_JLI_CFLAGS)
332 # Setup OPENJDK_TARGET_OS_API_DIR, used in source paths.
333 if test "x$OPENJDK_TARGET_OS_API" = xposix; then
334 OPENJDK_TARGET_OS_API_DIR="solaris"
335 fi
336 if test "x$OPENJDK_TARGET_OS_API" = xwinapi; then
337 OPENJDK_TARGET_OS_API_DIR="windows"
338 fi
339 AC_SUBST(OPENJDK_TARGET_OS_API_DIR)
341 if test "x$OPENJDK_TARGET_OS" = xmacosx; then
342 OPENJDK_TARGET_OS_EXPORT_DIR=macosx
343 else
344 OPENJDK_TARGET_OS_EXPORT_DIR=${OPENJDK_TARGET_OS_API_DIR}
345 fi
346 AC_SUBST(OPENJDK_TARGET_OS_EXPORT_DIR)
348 if test "x$OPENJDK_TARGET_CPU_BITS" = x64; then
349 A_LP64="LP64:="
350 # -D_LP64=1 is only set on linux and mac. Setting on windows causes diff in
351 # unpack200.exe
352 if test "x$OPENJDK_TARGET_OS" = xlinux || test "x$OPENJDK_TARGET_OS" = xmacosx; then
353 ADD_LP64="-D_LP64=1"
354 fi
355 fi
356 AC_SUBST(LP64,$A_LP64)
358 if test "x$COMPILE_TYPE" = "xcross"; then
359 # FIXME: ... or should this include reduced builds..?
360 DEFINE_CROSS_COMPILE_ARCH="CROSS_COMPILE_ARCH:=$OPENJDK_TARGET_CPU_LEGACY"
361 else
362 DEFINE_CROSS_COMPILE_ARCH=""
363 fi
364 AC_SUBST(DEFINE_CROSS_COMPILE_ARCH)
366 # ZERO_ARCHDEF is used to enable architecture-specific code
367 case "${OPENJDK_TARGET_CPU}" in
368 ppc*) ZERO_ARCHDEF=PPC ;;
369 s390*) ZERO_ARCHDEF=S390 ;;
370 sparc*) ZERO_ARCHDEF=SPARC ;;
371 x86_64*) ZERO_ARCHDEF=AMD64 ;;
372 x86) ZERO_ARCHDEF=IA32 ;;
373 *) ZERO_ARCHDEF=$(echo "${OPENJDK_TARGET_CPU_LEGACY_LIB}" | tr a-z A-Z)
374 esac
375 AC_SUBST(ZERO_ARCHDEF)
376 ])
378 AC_DEFUN([PLATFORM_SET_RELEASE_FILE_OS_VALUES],
379 [
380 if test "x$OPENJDK_TARGET_OS" = "xsolaris"; then
381 REQUIRED_OS_NAME=SunOS
382 REQUIRED_OS_VERSION=5.10
383 fi
384 if test "x$OPENJDK_TARGET_OS" = "xlinux"; then
385 REQUIRED_OS_NAME=Linux
386 REQUIRED_OS_VERSION=2.6
387 fi
388 if test "x$OPENJDK_TARGET_OS" = "xwindows"; then
389 REQUIRED_OS_NAME=Windows
390 if test "x$OPENJDK_TARGET_CPU_BITS" = "x64"; then
391 REQUIRED_OS_VERSION=5.2
392 else
393 REQUIRED_OS_VERSION=5.1
394 fi
395 fi
396 if test "x$OPENJDK_TARGET_OS" = "xmacosx"; then
397 REQUIRED_OS_NAME=Darwin
398 REQUIRED_OS_VERSION=11.2
399 fi
401 AC_SUBST(REQUIRED_OS_NAME)
402 AC_SUBST(REQUIRED_OS_VERSION)
403 ])
405 #%%% Build and target systems %%%
406 AC_DEFUN_ONCE([PLATFORM_SETUP_OPENJDK_BUILD_AND_TARGET],
407 [
408 # Figure out the build and target systems. # Note that in autoconf terminology, "build" is obvious, but "target"
409 # is confusing; it assumes you are cross-compiling a cross-compiler (!) and "target" is thus the target of the
410 # product you're building. The target of this build is called "host". Since this is confusing to most people, we
411 # have not adopted that system, but use "target" as the platform we are building for. In some places though we need
412 # to use the configure naming style.
413 AC_CANONICAL_BUILD
414 AC_CANONICAL_HOST
415 AC_CANONICAL_TARGET
417 PLATFORM_EXTRACT_TARGET_AND_BUILD
418 PLATFORM_SETUP_TARGET_CPU_BITS
419 PLATFORM_SET_RELEASE_FILE_OS_VALUES
420 PLATFORM_SETUP_LEGACY_VARS
421 ])
423 AC_DEFUN_ONCE([PLATFORM_SETUP_OPENJDK_BUILD_OS_VERSION],
424 [
425 ###############################################################################
427 # Note that this is the build platform OS version!
429 OS_VERSION="`uname -r | ${SED} 's!\.! !g' | ${SED} 's!-! !g'`"
430 OS_VERSION_MAJOR="`${ECHO} ${OS_VERSION} | ${CUT} -f 1 -d ' '`"
431 OS_VERSION_MINOR="`${ECHO} ${OS_VERSION} | ${CUT} -f 2 -d ' '`"
432 OS_VERSION_MICRO="`${ECHO} ${OS_VERSION} | ${CUT} -f 3 -d ' '`"
433 AC_SUBST(OS_VERSION_MAJOR)
434 AC_SUBST(OS_VERSION_MINOR)
435 AC_SUBST(OS_VERSION_MICRO)
436 ])
438 # Support macro for PLATFORM_SETUP_OPENJDK_TARGET_BITS.
439 # Add -mX to various FLAGS variables.
440 AC_DEFUN([PLATFORM_SET_COMPILER_TARGET_BITS_FLAGS],
441 [
442 # When we add flags to the "official" CFLAGS etc, we need to
443 # keep track of these additions in ADDED_CFLAGS etc. These
444 # will later be checked to make sure only controlled additions
445 # have been made to CFLAGS etc.
446 ADDED_CFLAGS=" ${COMPILER_TARGET_BITS_FLAG}${OPENJDK_TARGET_CPU_BITS}"
447 ADDED_CXXFLAGS=" ${COMPILER_TARGET_BITS_FLAG}${OPENJDK_TARGET_CPU_BITS}"
448 ADDED_LDFLAGS=" ${COMPILER_TARGET_BITS_FLAG}${OPENJDK_TARGET_CPU_BITS}"
450 CFLAGS="${CFLAGS}${ADDED_CFLAGS}"
451 CXXFLAGS="${CXXFLAGS}${ADDED_CXXFLAGS}"
452 LDFLAGS="${LDFLAGS}${ADDED_LDFLAGS}"
454 CFLAGS_JDK="${CFLAGS_JDK}${ADDED_CFLAGS}"
455 CXXFLAGS_JDK="${CXXFLAGS_JDK}${ADDED_CXXFLAGS}"
456 LDFLAGS_JDK="${LDFLAGS_JDK}${ADDED_LDFLAGS}"
457 ])
459 AC_DEFUN_ONCE([PLATFORM_SETUP_OPENJDK_TARGET_BITS],
460 [
461 ###############################################################################
462 #
463 # Now we check if libjvm.so will use 32 or 64 bit pointers for the C/C++ code.
464 # (The JVM can use 32 or 64 bit Java pointers but that decision
465 # is made at runtime.)
466 #
468 if test "x$OPENJDK_TARGET_OS" = xsolaris || test "x$OPENJDK_TARGET_OS" = xaix; then
469 # Always specify -m flag on Solaris
470 # And -q on AIX because otherwise the compiler produces 32-bit objects by default
471 PLATFORM_SET_COMPILER_TARGET_BITS_FLAGS
472 elif test "x$COMPILE_TYPE" = xreduced; then
473 if test "x$OPENJDK_TARGET_OS" != xwindows; then
474 # Specify -m if running reduced on other Posix platforms
475 PLATFORM_SET_COMPILER_TARGET_BITS_FLAGS
476 fi
477 fi
479 # Make compilation sanity check
480 AC_CHECK_HEADERS([stdio.h], , [
481 AC_MSG_NOTICE([Failed to compile stdio.h. This likely implies missing compile dependencies.])
482 if test "x$COMPILE_TYPE" = xreduced; then
483 AC_MSG_NOTICE([You are doing a reduced build. Check that you have 32-bit libraries installed.])
484 elif test "x$COMPILE_TYPE" = xcross; then
485 AC_MSG_NOTICE([You are doing a cross-compilation. Check that you have all target platform libraries installed.])
486 fi
487 AC_MSG_ERROR([Cannot continue.])
488 ])
490 AC_CHECK_SIZEOF([int *], [1111])
492 # AC_CHECK_SIZEOF defines 'ac_cv_sizeof_int_p' to hold the number of bytes used by an 'int*'
493 if test "x$ac_cv_sizeof_int_p" = x; then
494 # The test failed, lets stick to the assumed value.
495 AC_MSG_WARN([The number of bits in the target could not be determined, using $OPENJDK_TARGET_CPU_BITS.])
496 else
497 TESTED_TARGET_CPU_BITS=`expr 8 \* $ac_cv_sizeof_int_p`
499 if test "x$TESTED_TARGET_CPU_BITS" != "x$OPENJDK_TARGET_CPU_BITS"; then
500 # This situation may happen on 64-bit platforms where the compiler by default only generates 32-bit objects
501 # Let's try to implicitely set the compilers target architecture and retry the test
502 AC_MSG_NOTICE([The tested number of bits in the target ($TESTED_TARGET_CPU_BITS) differs from the number of bits expected to be found in the target ($OPENJDK_TARGET_CPU_BITS).])
503 AC_MSG_NOTICE([I'll retry after setting the platforms compiler target bits flag to ${COMPILER_TARGET_BITS_FLAG}${OPENJDK_TARGET_CPU_BITS}])
504 PLATFORM_SET_COMPILER_TARGET_BITS_FLAGS
506 # We have to unset 'ac_cv_sizeof_int_p' first, otherwise AC_CHECK_SIZEOF will use the previously cached value!
507 unset ac_cv_sizeof_int_p
508 # And we have to undef the definition of SIZEOF_INT_P in confdefs.h by the previous invocation of AC_CHECK_SIZEOF
509 cat >>confdefs.h <<_ACEOF
510 #undef SIZEOF_INT_P
511 _ACEOF
513 AC_CHECK_SIZEOF([int *], [1111])
515 TESTED_TARGET_CPU_BITS=`expr 8 \* $ac_cv_sizeof_int_p`
517 if test "x$TESTED_TARGET_CPU_BITS" != "x$OPENJDK_TARGET_CPU_BITS"; then
518 AC_MSG_ERROR([The tested number of bits in the target ($TESTED_TARGET_CPU_BITS) differs from the number of bits expected to be found in the target ($OPENJDK_TARGET_CPU_BITS)])
519 fi
520 fi
521 fi
523 AC_MSG_CHECKING([for target address size])
524 AC_MSG_RESULT([$OPENJDK_TARGET_CPU_BITS bits])
525 ])
527 AC_DEFUN_ONCE([PLATFORM_SETUP_OPENJDK_TARGET_ENDIANNESS],
528 [
529 ###############################################################################
530 #
531 # Is the target little of big endian?
532 #
533 AC_C_BIGENDIAN([ENDIAN="big"],[ENDIAN="little"],[ENDIAN="unknown"],[ENDIAN="universal_endianness"])
535 if test "x$ENDIAN" = xuniversal_endianness; then
536 AC_MSG_ERROR([Building with both big and little endianness is not supported])
537 fi
538 if test "x$ENDIAN" != "x$OPENJDK_TARGET_CPU_ENDIAN"; then
539 AC_MSG_ERROR([The tested endian in the target ($ENDIAN) differs from the endian expected to be found in the target ($OPENJDK_TARGET_CPU_ENDIAN)])
540 fi
541 ])