libraries.m4 revision 476:2ba6f4da4bf3 
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#
25
26AC_DEFUN_ONCE([LIB_SETUP_INIT],
27[
28        
29###############################################################################
30#
31# OS specific settings that we never will need to probe.
32#
33if test "x$OPENJDK_TARGET_OS" = xlinux; then
34    AC_MSG_CHECKING([what is not needed on Linux?])
35    PULSE_NOT_NEEDED=yes
36    AC_MSG_RESULT([pulse])
37fi
38
39if test "x$OPENJDK_TARGET_OS" = xsolaris; then
40    AC_MSG_CHECKING([what is not needed on Solaris?])
41    ALSA_NOT_NEEDED=yes
42    PULSE_NOT_NEEDED=yes
43    AC_MSG_RESULT([alsa pulse])
44fi
45
46if test "x$OPENJDK_TARGET_OS" = xwindows; then
47    AC_MSG_CHECKING([what is not needed on Windows?])
48    CUPS_NOT_NEEDED=yes    
49    ALSA_NOT_NEEDED=yes
50    PULSE_NOT_NEEDED=yes
51    X11_NOT_NEEDED=yes
52    AC_MSG_RESULT([alsa cups pulse x11])
53fi
54
55if test "x$OPENJDK_TARGET_OS" = xmacosx; then
56    AC_MSG_CHECKING([what is not needed on MacOSX?])
57    ALSA_NOT_NEEDED=yes
58    PULSE_NOT_NEEDED=yes
59    X11_NOT_NEEDED=yes
60    FREETYPE2_NOT_NEEDED=yes    
61    # If the java runtime framework is disabled, then we need X11.
62    # This will be adjusted below.
63    AC_MSG_RESULT([alsa pulse x11])
64fi
65
66if test "x$OPENJDK_TARGET_OS" = xbsd; then
67    AC_MSG_CHECKING([what is not needed on bsd?])
68    ALSA_NOT_NEEDED=yes
69    AC_MSG_RESULT([alsa])    
70fi
71
72if test "x$OPENJDK" = "xfalse"; then
73    FREETYPE2_NOT_NEEDED=yes
74fi
75
76if test "x$SUPPORT_HEADFUL" = xno; then
77    X11_NOT_NEEDED=yes
78fi
79
80###############################################################################
81#
82# Check for MacOSX support for OpenJDK. If this exists, try to build a JVM
83# that uses this API. 
84#
85AC_ARG_ENABLE([macosx-runtime-support], [AS_HELP_STRING([--disable-macosx-runtime-support],
86	[disable the use of MacOSX Java runtime support framework @<:@enabled@:>@])],
87	[MACOSX_RUNTIME_SUPPORT="${enableval}"],[MACOSX_RUNTIME_SUPPORT="no"])
88
89USE_MACOSX_RUNTIME_SUPPORT=no
90AC_MSG_CHECKING([for explicit Java runtime support in the OS])
91if test -f /System/Library/Frameworks/JavaVM.framework/Frameworks/JavaRuntimeSupport.framework/Headers/JavaRuntimeSupport.h; then
92    if test "x$MACOSX_RUNTIME_SUPPORT" != xno; then
93        MACOSX_RUNTIME_SUPPORT=yes
94        USE_MACOSX_RUNTIME_SUPPORT=yes
95        AC_MSG_RESULT([yes, does not need alsa freetype2 pulse and X11])
96    else
97        AC_MSG_RESULT([yes, but explicitly disabled.])
98    fi
99else
100    AC_MSG_RESULT([no])
101fi
102
103if test "x$OPENJDK_TARGET_OS" = xmacosx && test "x$USE_MACOSX_RUNTIME_SUPPORT" = xno; then
104    AC_MSG_CHECKING([what is not needed on an X11 build on MacOSX?])
105    X11_NOT_NEEDED=
106    FREETYPE2_NOT_NEEDED=
107    AC_MSG_RESULT([alsa pulse])
108fi
109])
110
111AC_DEFUN_ONCE([LIB_SETUP_X11],
112[
113
114###############################################################################
115#
116# Check for X Windows
117#
118
119# Check if the user has specified sysroot, but not --x-includes or --x-libraries.
120# Make a simple check for the libraries at the sysroot, and setup --x-includes and
121# --x-libraries for the sysroot, if that seems to be correct.
122if test "x$SYS_ROOT" != "x/"; then
123  if test "x$x_includes" = xNONE; then
124    if test -f "$SYS_ROOT/usr/X11R6/include/X11/Xlib.h"; then
125      x_includes="$SYS_ROOT/usr/X11R6/include"
126    fi
127  fi
128  if test "x$x_libraries" = xNONE; then
129    if test -f "$SYS_ROOT/usr/X11R6/lib/libX11.so"; then
130      x_libraries="$SYS_ROOT/usr/X11R6/lib"
131    fi
132  fi
133fi
134
135# Now let autoconf do it's magic
136AC_PATH_X
137AC_PATH_XTRA
138
139if test "x$no_x" = xyes && test "x$X11_NOT_NEEDED" != xyes; then 
140    HELP_MSG_MISSING_DEPENDENCY([x11])
141    AC_MSG_ERROR([Could not find X11 libraries. $HELP_MSG])
142fi
143
144# Some of the old makefiles require a setting of OPENWIN_HOME
145# Since the X11R6 directory has disappeared on later Linuxes,
146# we need to probe for it.
147if test "x$OPENJDK_TARGET_OS" = xlinux; then
148    if test -d "$SYS_ROOT/usr/X11R6"; then
149        OPENWIN_HOME="$SYS_ROOT/usr/X11R6"
150    fi
151    if test -d "$SYS_ROOT/usr/include/X11"; then
152        OPENWIN_HOME="$SYS_ROOT/usr"
153    fi
154fi
155if test "x$OPENJDK_TARGET_OS" = xsolaris; then
156    OPENWIN_HOME="/usr/openwin"
157fi
158AC_SUBST(OPENWIN_HOME)
159
160
161#
162# Weird Sol10 something check...TODO change to try compile
163#
164if test "x${OPENJDK_TARGET_OS}" = xsolaris; then
165  if test "`uname -r`" = "5.10"; then
166     if test "`${EGREP} -c XLinearGradient ${OPENWIN_HOME}/share/include/X11/extensions/Xrender.h`" = "0"; then
167     	X_CFLAGS="${X_CFLAGS} -DSOLARIS10_NO_XRENDER_STRUCTS"
168     fi
169  fi
170fi
171
172AC_LANG_PUSH(C)
173OLD_CFLAGS="$CFLAGS"
174CFLAGS="$CFLAGS $X_CFLAGS"
175AC_CHECK_HEADERS([X11/extensions/shape.h X11/extensions/Xrender.h X11/extensions/XTest.h],
176                [X11_A_OK=yes],
177                [X11_A_OK=no])
178CFLAGS="$OLD_CFLAGS"
179AC_LANG_POP(C)
180
181if test "x$X11_A_OK" = xno && test "x$X11_NOT_NEEDED" != xyes; then 
182    HELP_MSG_MISSING_DEPENDENCY([x11])
183    AC_MSG_ERROR([Could not find all X11 headers (shape.h Xrender.h XTest.h). $HELP_MSG])
184fi
185
186AC_SUBST(X_CFLAGS)
187AC_SUBST(X_LIBS)
188])
189
190AC_DEFUN_ONCE([LIB_SETUP_CUPS],
191[
192
193###############################################################################
194#
195# The common unix printing system cups is used to print from java.
196#
197AC_ARG_WITH(cups, [AS_HELP_STRING([--with-cups],
198    [specify prefix directory for the cups package
199	 (expecting the libraries under PATH/lib and the headers under PATH/include)])])
200AC_ARG_WITH(cups-include, [AS_HELP_STRING([--with-cups-include],
201	[specify directory for the cups include files])])
202AC_ARG_WITH(cups-lib, [AS_HELP_STRING([--with-cups-lib],
203	[specify directory for the cups library])])
204
205if test "x$CUPS_NOT_NEEDED" = xyes; then
206	if test "x${with_cups}" != x || test "x${with_cups_include}" != x || test "x${with_cups_lib}" != x; then
207		AC_MSG_WARN([cups not used, so --with-cups is ignored])
208	fi
209	CUPS_CFLAGS=
210	CUPS_LIBS=
211else
212	CUPS_FOUND=no
213
214	if test "x${with_cups}" = xno || test "x${with_cups_include}" = xno || test "x${with_cups_lib}" = xno; then
215	    AC_MSG_ERROR([It is not possible to disable the use of cups. Remove the --without-cups option.])
216	fi
217
218	if test "x${with_cups}" != x; then
219	    CUPS_LIBS="-L${with_cups}/lib -lcups"
220	    CUPS_CFLAGS="-I${with_cups}/include"
221	    CUPS_FOUND=yes
222	fi
223	if test "x${with_cups_include}" != x; then
224	    CUPS_CFLAGS="-I${with_cups_include}"
225	    CUPS_FOUND=yes
226	fi
227	if test "x${with_cups_lib}" != x; then
228	    CUPS_LIBS="-L${with_cups_lib} -lcups"
229	    CUPS_FOUND=yes
230	fi
231	if test "x$CUPS_FOUND" = xno; then
232	    BDEPS_CHECK_MODULE(CUPS, cups, xxx, [CUPS_FOUND=yes])
233	fi
234	if test "x$CUPS_FOUND" = xno; then
235	    # Are the cups headers installed in the default /usr/include location?
236	    AC_CHECK_HEADERS([cups/cups.h cups/ppd.h],
237	                     [CUPS_FOUND=yes
238	                      CUPS_CFLAGS=
239	                      CUPS_LIBS="-lcups"
240	                      DEFAULT_CUPS=yes])
241	fi
242	if test "x$CUPS_FOUND" = xno; then
243	    # Getting nervous now? Lets poke around for standard Solaris third-party
244	    # package installation locations.
245	    AC_MSG_CHECKING([for cups headers and libs])
246	    if test -s /opt/sfw/cups/include/cups/cups.h; then
247	       # An SFW package seems to be installed!
248	       CUPS_FOUND=yes
249	       CUPS_CFLAGS="-I/opt/sfw/cups/include"
250	       CUPS_LIBS="-L/opt/sfw/cups/lib -lcups"
251	    elif test -s /opt/csw/include/cups/cups.h; then
252	       # A CSW package seems to be installed!
253	       CUPS_FOUND=yes
254	       CUPS_CFLAGS="-I/opt/csw/include"
255	       CUPS_LIBS="-L/opt/csw/lib -lcups"
256	    fi
257	    AC_MSG_RESULT([$CUPS_FOUND])
258	fi
259	if test "x$CUPS_FOUND" = xno; then 
260	    HELP_MSG_MISSING_DEPENDENCY([cups])
261	    AC_MSG_ERROR([Could not find cups! $HELP_MSG ])
262	fi
263fi
264
265AC_SUBST(CUPS_CFLAGS)
266AC_SUBST(CUPS_LIBS)
267
268])
269
270AC_DEFUN_ONCE([LIB_SETUP_FREETYPE],
271[
272
273###############################################################################
274#
275# The ubiquitous freetype2 library is used to render fonts.
276#
277AC_ARG_WITH(freetype, [AS_HELP_STRING([--with-freetype],
278	[specify prefix directory for the freetype2 package
279     (expecting the libraries under PATH/lib and the headers under PATH/include)])])
280
281# If we are using the OS installed system lib for freetype, then we do not need to copy it to the build tree
282USING_SYSTEM_FT_LIB=false
283
284if test "x$FREETYPE2_NOT_NEEDED" = xyes; then
285	if test "x$with_freetype" != x || test "x$with_freetype_include" != x || test "x$with_freetype_lib" != x; then
286		AC_MSG_WARN([freetype not used, so --with-freetype is ignored])
287	fi
288	FREETYPE2_CFLAGS=
289	FREETYPE2_LIBS=
290        FREETYPE2_LIB_PATH=
291else
292	FREETYPE2_FOUND=no
293
294	if test "x$with_freetype" != x; then
295            SPACESAFE(with_freetype,[the path to freetype])
296	    FREETYPE2_LIBS="-L$with_freetype/lib -lfreetype"
297            if test "x$OPENJDK_TARGET_OS" = xwindows; then
298                FREETYPE2_LIBS="$with_freetype/lib/freetype.lib"
299            fi
300            FREETYPE2_LIB_PATH="$with_freetype/lib"
301	    FREETYPE2_CFLAGS="-I$with_freetype/include"
302            if test -s $with_freetype/include/ft2build.h && test -d $with_freetype/include/freetype2/freetype; then
303                FREETYPE2_CFLAGS="-I$with_freetype/include/freetype2 -I$with_freetype/include"
304            fi
305	    FREETYPE2_FOUND=yes
306   	    if test "x$FREETYPE2_FOUND" = xyes; then
307	        # Verify that the directories exist 
308                if ! test -d "$with_freetype/lib" || ! test -d "$with_freetype/include"; then
309		   AC_MSG_ERROR([Could not find the expected directories $with_freetype/lib and $with_freetype/include])
310		fi
311	        # List the contents of the lib.
312		FREETYPELIB=`ls $with_freetype/lib/libfreetype.so $with_freetype/lib/freetype.dll 2> /dev/null`
313                if test "x$FREETYPELIB" = x; then
314		   AC_MSG_ERROR([Could not find libfreetype.se nor freetype.dll in $with_freetype/lib])
315		fi
316	        # Check one h-file
317                if ! test -s "$with_freetype/include/ft2build.h"; then
318		   AC_MSG_ERROR([Could not find $with_freetype/include/ft2build.h])
319		fi
320            fi
321        fi
322	if test "x$FREETYPE2_FOUND" = xno; then
323	    BDEPS_CHECK_MODULE(FREETYPE2, freetype2, xxx, [FREETYPE2_FOUND=yes], [FREETYPE2_FOUND=no])
324            USING_SYSTEM_FT_LIB=true
325	fi
326	if test "x$FREETYPE2_FOUND" = xno; then
327	    PKG_CHECK_MODULES(FREETYPE2, freetype2, [FREETYPE2_FOUND=yes], [FREETYPE2_FOUND=no])
328            USING_SYSTEM_FT_LIB=true
329	fi
330	if test "x$FREETYPE2_FOUND" = xno; then
331	    AC_MSG_CHECKING([for freetype in some standard locations])
332	
333	    if test -s /usr/X11/include/ft2build.h && test -d /usr/X11/include/freetype2/freetype; then
334	        DEFAULT_FREETYPE_CFLAGS="-I/usr/X11/include/freetype2 -I/usr/X11/include"
335	        DEFAULT_FREETYPE_LIBS="-L/usr/X11/lib -lfreetype"
336	    fi
337	    if test -s /usr/include/ft2build.h && test -d /usr/include/freetype2/freetype; then
338	        DEFAULT_FREETYPE_CFLAGS="-I/usr/include/freetype2"
339	        DEFAULT_FREETYPE_LIBS="-lfreetype"
340	    fi
341	
342	    PREV_CXXCFLAGS="$CXXFLAGS"
343	    PREV_LDFLAGS="$LDFLAGS"
344	    CXXFLAGS="$CXXFLAGS $DEFAULT_FREETYPE_CFLAGS"
345	    LDFLAGS="$LDFLAGS $DEFAULT_FREETYPE_LIBS"
346	    AC_LINK_IFELSE([AC_LANG_SOURCE([[#include<ft2build.h>
347	                    #include FT_FREETYPE_H 
348	                   int main() { return 0; }
349	                  ]])],
350	                  [
351	                      # Yes, the default cflags and libs did the trick.
352	                      FREETYPE2_FOUND=yes
353	                      FREETYPE2_CFLAGS="$DEFAULT_FREETYPE_CFLAGS"
354	                      FREETYPE2_LIBS="$DEFAULT_FREETYPE_LIBS"
355	                  ],
356	                  [
357	                      FREETYPE2_FOUND=no
358	                  ])
359            CXXCFLAGS="$PREV_CXXFLAGS"
360	    LDFLAGS="$PREV_LDFLAGS"
361	    AC_MSG_RESULT([$FREETYPE2_FOUND])
362            USING_SYSTEM_FT_LIB=true
363	fi
364	if test "x$FREETYPE2_FOUND" = xno; then
365		HELP_MSG_MISSING_DEPENDENCY([freetype2])
366		AC_MSG_ERROR([Could not find freetype2! $HELP_MSG ])
367	fi    
368fi
369
370AC_SUBST(USING_SYSTEM_FT_LIB)
371AC_SUBST(FREETYPE2_LIB_PATH)
372AC_SUBST(FREETYPE2_CFLAGS)
373AC_SUBST(FREETYPE2_LIBS)
374
375])
376
377AC_DEFUN_ONCE([LIB_SETUP_ALSA],
378[
379
380###############################################################################
381#
382# Check for alsa headers and libraries. Used on Linux/GNU systems.
383#
384AC_ARG_WITH(alsa, [AS_HELP_STRING([--with-alsa],
385	[specify prefix directory for the alsa package
386	 (expecting the libraries under PATH/lib and the headers under PATH/include)])])
387AC_ARG_WITH(alsa-include, [AS_HELP_STRING([--with-alsa-include],
388	[specify directory for the alsa include files])])
389AC_ARG_WITH(alsa-lib, [AS_HELP_STRING([--with-alsa-lib],
390	[specify directory for the alsa library])])
391
392if test "x$ALSA_NOT_NEEDED" = xyes; then
393	if test "x${with_alsa}" != x || test "x${with_alsa_include}" != x || test "x${with_alsa_lib}" != x; then
394		AC_MSG_WARN([alsa not used, so --with-alsa is ignored])
395	fi
396	ALSA_CFLAGS=
397	ALSA_LIBS=
398else
399	ALSA_FOUND=no
400
401	if test "x${with_alsa}" = xno || test "x${with_alsa_include}" = xno || test "x${with_alsa_lib}" = xno; then
402	    AC_MSG_ERROR([It is not possible to disable the use of alsa. Remove the --without-alsa option.])
403	fi
404
405	if test "x${with_alsa}" != x; then
406	    ALSA_LIBS="-L${with_alsa}/lib -lalsa"
407	    ALSA_CFLAGS="-I${with_alsa}/include"
408	    ALSA_FOUND=yes
409	fi
410	if test "x${with_alsa_include}" != x; then
411	    ALSA_CFLAGS="-I${with_alsa_include}"
412	    ALSA_FOUND=yes
413	fi
414	if test "x${with_alsa_lib}" != x; then
415	    ALSA_LIBS="-L${with_alsa_lib} -lalsa"
416	    ALSA_FOUND=yes
417	fi
418	if test "x$ALSA_FOUND" = xno; then
419	    BDEPS_CHECK_MODULE(ALSA, alsa, xxx, [ALSA_FOUND=yes], [ALSA_FOUND=no])
420	fi
421	if test "x$ALSA_FOUND" = xno; then
422	    PKG_CHECK_MODULES(ALSA, alsa, [ALSA_FOUND=yes], [ALSA_FOUND=no])
423	fi
424	if test "x$ALSA_FOUND" = xno; then
425	    AC_CHECK_HEADERS([alsa/asoundlib.h],
426	                     [ALSA_FOUND=yes
427	                      ALSA_CFLAGS=-Iignoreme
428	                      ALSA_LIBS=-lasound
429	                      DEFAULT_ALSA=yes],
430	                     [ALSA_FOUND=no])
431	fi
432	if test "x$ALSA_FOUND" = xno; then 
433	    HELP_MSG_MISSING_DEPENDENCY([alsa])
434	    AC_MSG_ERROR([Could not find alsa! $HELP_MSG ])
435	fi    
436fi
437
438AC_SUBST(ALSA_CFLAGS)
439AC_SUBST(ALSA_LIBS)
440
441])
442
443AC_DEFUN_ONCE([LIB_SETUP_MISC_LIBS],
444[
445
446###############################################################################
447#
448# Check for the jpeg library
449#
450
451USE_EXTERNAL_LIBJPEG=true
452AC_CHECK_LIB(jpeg, main, [],
453             [ USE_EXTERNAL_LIBJPEG=false
454               AC_MSG_NOTICE([Will use jpeg decoder bundled with the OpenJDK source])
455             ])
456AC_SUBST(USE_EXTERNAL_LIBJPEG)
457        
458###############################################################################
459#
460# Check for the gif library
461#
462
463USE_EXTERNAL_LIBJPEG=true
464AC_CHECK_LIB(gif, main, [],
465             [ USE_EXTERNAL_LIBGIF=false
466               AC_MSG_NOTICE([Will use gif decoder bundled with the OpenJDK source])
467             ])
468AC_SUBST(USE_EXTERNAL_LIBGIF)
469
470###############################################################################
471#
472# Check for the zlib library
473#
474
475AC_ARG_WITH(zlib, [AS_HELP_STRING([--with-zlib],
476	[use zlib from build system or OpenJDK source (system, bundled) @<:@bundled@:>@])])
477
478AC_CHECK_LIB(z, compress,
479             [ ZLIB_FOUND=yes ],
480             [ ZLIB_FOUND=no ])
481
482AC_MSG_CHECKING([for which zlib to use])
483
484DEFAULT_ZLIB=bundled
485if test "x$OPENJDK_TARGET_OS" = xmacosx; then
486#
487# On macosx default is system...on others default is 
488#
489    DEFAULT_ZLIB=system
490fi
491
492if test "x${ZLIB_FOUND}" != "xyes"; then
493#
494# If we don't find any system...set default to bundled
495#
496    DEFAULT_ZLIB=bundled
497fi
498
499#
500# If user didn't specify, use DEFAULT_ZLIB
501#
502if test "x${with_zlib}" = "x"; then
503    with_zlib=${DEFAULT_ZLIB}
504fi
505
506if test "x${with_zlib}" = "xbundled"; then
507    USE_EXTERNAL_LIBZ=false
508    AC_MSG_RESULT([bundled])
509elif test "x${with_zlib}" = "xsystem"; then
510    if test "x${ZLIB_FOUND}" = "xyes"; then
511        USE_EXTERNAL_LIBZ=true
512        AC_MSG_RESULT([system])
513    else
514        AC_MSG_RESULT([system not found])
515        AC_MSG_ERROR([--with-zlib=system specified, but no zlib found!])  
516    fi
517else
518    AC_MSG_ERROR([Invalid value for --with-zlib: ${with_zlib}, use 'system' or 'bundled'])  
519fi
520
521AC_SUBST(USE_EXTERNAL_LIBZ)
522
523###############################################################################
524LIBZIP_CAN_USE_MMAP=true
525
526AC_SUBST(LIBZIP_CAN_USE_MMAP)
527
528###############################################################################
529#
530# Check if altzone exists in time.h
531#
532
533AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <time.h>], [return (int)altzone;])],
534            [has_altzone=yes],
535            [has_altzone=no])
536if test "x$has_altzone" = xyes; then
537    AC_DEFINE([HAVE_ALTZONE], 1, [Define if you have the external 'altzone' variable in time.h])
538fi
539
540###############################################################################
541#
542# Check the maths library
543#
544
545AC_CHECK_LIB(m, cos, [],
546             [ 
547                  AC_MSG_NOTICE([Maths library was not found])
548             ])
549AC_SUBST(LIBM)
550
551###############################################################################
552#
553# Check for libdl.so
554
555save_LIBS="$LIBS"
556LIBS=""
557AC_CHECK_LIB(dl,dlopen)
558LIBDL="$LIBS"
559AC_SUBST(LIBDL)
560LIBS="$save_LIBS"
561
562])
563
564AC_DEFUN_ONCE([LIB_SETUP_STATIC_LINK_LIBSTDCPP],
565[
566###############################################################################
567#
568# statically link libstdc++ before C++ ABI is stablized on Linux unless 
569# dynamic build is configured on command line.
570#
571AC_ARG_ENABLE([static-link-stdc++], [AS_HELP_STRING([--disable-static-link-stdc++],
572	[disable static linking of the C++ runtime on Linux @<:@enabled@:>@])],,
573	[
574		enable_static_link_stdc__=yes
575    ])
576
577if test "x$OPENJDK_TARGET_OS" = xlinux; then
578    # Test if -lstdc++ works.
579    AC_MSG_CHECKING([if dynamic link of stdc++ is possible])
580    AC_LANG_PUSH(C++)
581    OLD_CXXFLAGS="$CXXFLAGS"
582    CXXFLAGS="$CXXFLAGS -lstdc++"
583    AC_LINK_IFELSE([AC_LANG_PROGRAM([], [return 0;])],
584            [has_dynamic_libstdcxx=yes],
585            [has_dynamic_libstdcxx=no])
586    CXXFLAGS="$OLD_CXXFLAGS"
587    AC_LANG_POP(C++)
588    AC_MSG_RESULT([$has_dynamic_libstdcxx])
589
590    # Test if stdc++ can be linked statically.
591    AC_MSG_CHECKING([if static link of stdc++ is possible])
592    STATIC_STDCXX_FLAGS="-Wl,-Bstatic -lstdc++ -lgcc -Wl,-Bdynamic"
593    AC_LANG_PUSH(C++)
594    OLD_LIBS="$LIBS"
595    OLD_CXX="$CXX"
596    LIBS="$STATIC_STDCXX_FLAGS"
597    CXX="$CC"                       
598    AC_LINK_IFELSE([AC_LANG_PROGRAM([], [return 0;])],
599            [has_static_libstdcxx=yes],
600            [has_static_libstdcxx=no])
601    LIBS="$OLD_LIBS"
602    CXX="$OLD_CXX"
603    AC_LANG_POP(C++)
604    AC_MSG_RESULT([$has_static_libstdcxx])
605
606    if test "x$has_static_libcxx" = xno && test "x$has_dynamic_libcxx" = xno; then
607        AC_MSG_ERROR([I cannot link to stdc++! Neither dynamically nor statically.])
608    fi
609
610    if test "x$enable_static_link_stdc__" = xyes && test "x$has_static_libstdcxx" = xno; then
611        AC_MSG_NOTICE([Static linking of libstdc++ was not possible reverting to dynamic linking.])
612        enable_static_link_stdc__=no
613    fi
614
615    if test "x$enable_static_link_stdc__" = xno && test "x$has_dynamic_libstdcxx" = xno; then
616        AC_MSG_NOTICE([Dynamic linking of libstdc++ was not possible reverting to static linking.])
617        enable_static_link_stdc__=yes
618    fi
619
620    AC_MSG_CHECKING([how to link with libstdc++])
621    if test "x$enable_static_link_stdc__" = xyes; then
622        LIBCXX="$LIBCXX $STATIC_STDCXX_FLAGS"
623        LDCXX="$CC"
624        AC_MSG_RESULT([static])
625    else
626        LIBCXX="$LIBCXX -lstdc++"
627        LDCXX="$CXX"
628        AC_MSG_RESULT([dynamic])
629    fi
630fi
631
632# libCrun is the c++ runtime-library with SunStudio (roughly the equivalent of gcc's libstdc++.so)
633if test "x$OPENJDK_TARGET_OS" = xsolaris && test "x$LIBCXX" = x; then
634    LIBCXX="/usr/lib${OPENJDK_TARGET_CPU_ISADIR}/libCrun.so.1"
635fi
636
637# TODO better (platform agnostic) test
638if test "x$OPENJDK_TARGET_OS" = xmacosx && test "x$LIBCXX" = x && test "x$GCC" = xyes; then
639    LIBCXX="-lstdc++"
640fi
641
642AC_SUBST(LIBCXX)
643
644])
645