1 # javacomp.m4 serial 8 (gettext-0.15)
2 dnl Copyright (C) 2001-2003, 2006 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 # Prerequisites of javacomp.sh.
8 # gt_JAVACOMP([source-version], [target-version])
9 # Sets HAVE_JAVACOMP to nonempty if javacomp.sh will allow Java source code
10 # according to source-version to be compiled to Java bytecode classes in the
11 # target-version format.
13 # source-version can be: support for
16 # 1.5 generic classes and methods
17 # 1.6 (not yet supported)
19 # target-version can be: classfile version:
26 # The classfile version of a .class file can be determined through the "file"
27 # command. More portably, the classfile major version can be determined through
28 # "od -A n -t d1 -j 7 -N 1 classfile".
29 # target-version can also be omitted. In this case, the required target-version
30 # is determined from the found JVM (see macro gt_JAVAEXEC):
31 # target-version for JVM
34 # 1.3 JDK/JRE 1.3, gij 3.3, 3.4
35 # 1.4 JDK/JRE 1.4, gij 4.0, 4.1
38 # Note: gij >= 3.3 can in some cases handle classes compiled with -target 1.4,
39 # and gij >= 4.1 can in some cases partially handle classes compiled with
40 # -target 1.5, but I have no idea how complete this support is.
42 # Specifying target-version is useful when building a library (.jar) that is
43 # useful outside the given package. Omitting target-version is useful when
44 # building an application.
46 # It is unreasonable to ask for:
47 # - target-version < 1.4 with source-version >= 1.4, or
48 # - target-version < 1.5 with source-version >= 1.5, or
49 # - target-version < 1.6 with source-version >= 1.6,
50 # because even Sun's javac doesn't support these combinations.
52 # It is redundant to ask for a target-version > source-version, since the
53 # smaller target-version = source-version will also always work and newer JVMs
54 # support the older target-versions too. Except for the case
55 # target-version = 1.4, source-version = 1.3, which allows gcj versions 3.0
58 AC_DEFUN([gt_JAVACOMP],
60 ifelse([$2], [], [AC_REQUIRE([gt_JAVAEXEC])], [])
62 #if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__ || defined __EMX__ || defined __DJGPP__
65 ], CLASSPATH_SEPARATOR=';', CLASSPATH_SEPARATOR=':')
67 test -n "$source_version" || {
68 AC_MSG_ERROR([missing source-version argument to gt_@&t@JAVACOMP])
71 [if test -n "$HAVE_JAVAEXEC"; then
72 dnl Use $CONF_JAVA to determine the JVM's version.
74 cat > conftestver.java <<EOF
75 public class conftestver {
76 public static void main (String[] args) {
77 System.out.println(System.getProperty("java.specification.version"));
82 dnl A precompiled version of conftestver.java, compiled with
83 dnl "javac -target 1.1". This avoids having to compile conftestver.java
84 dnl during each test for a suitable Java compiler.
85 dnl For the conversion from binary to this ASCII encapsulation, avoiding
86 dnl to assume the presence of uudecode, use the command
87 dnl $ od -A n -t o1 < conftestver.class | tr ' ' '\012'| sort | uniq | sed -e '/^$/d' -e 's,^,\\,' | tr -d '\012'
88 dnl and the long tr command in opposite direction.
89 echo 'xyvw!$!H!C,!)!2+!3!4*!5,!3!6,!7!8)!9)!:"!(LdhdmM"!$EFV"!%Ni_a"!1PdhaQngYakUXYfa"!%gXdh"!8EWPeXoXJfXhcJTmkdhcKFV"!,TinkZaOdfa"!2ZihbmalmoakIeXoX.!*!+)!;.!<!="!<eXoXIljaZdbdZXmdihIoakldih.!>!?)!@.!A!B"!-Zihbmalmoak"!2eXoXJfXhcJRYeaZm"!2eXoXJfXhcJTplmag"!$inm"!7PeXoXJdiJSkdhmTmkaXgK"!-camSkijakmp"!DEPeXoXJfXhcJTmkdhcKFPeXoXJfXhcJTmkdhcK"!5eXoXJdiJSkdhmTmkaXg"!)jkdhmfh"!7EPeXoXJfXhcJTmkdhcKFV!C!(!)!!!!!#!"!*!+!"!,!!!?!"!"!!!&Gt!"q!!!"!-!!!(!"!!!"!+!.!/!"!,!!!E!#!"!!!.r!#4$u!%s!&q!!!"!-!!!,!#!!!$!-!%!"!0!!!#!1' \
91 | tr '!"#$%&()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz' '\000\001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037\040\041\046\050\051\052\055\056\057\073\074\076\103\106\114\116\117\120\123\124\126\133\141\142\143\144\145\146\147\151\152\154\155\156\157\160\162\163\164\165\166\171\261\262\266\267\270\272\276\312\376' \
95 echo "$as_me:__oline__: CLASSPATH=.${CLASSPATH:+$CLASSPATH_SEPARATOR$CLASSPATH} $CONF_JAVA conftestver" >&AS_MESSAGE_LOG_FD
96 CLASSPATH=.${CLASSPATH:+$CLASSPATH_SEPARATOR$CLASSPATH} $CONF_JAVA conftestver 2>&AS_MESSAGE_LOG_FD
98 case "$target_version" in
99 1.1 | 1.2 | 1.3 | 1.4 | 1.5 | 1.6) ;;
101 dnl JDK 1.1.X returns null.
102 target_version=1.1 ;;
103 *) AC_MSG_WARN([unknown target-version $target_version, please update gt_@&t@JAVACOMP macro])
104 target_version=1.1 ;;
111 case "$source_version" in
112 1.3) goodcode='class conftest {}'
113 failcode='class conftestfail { static { assert(true); } }' ;;
114 1.4) goodcode='class conftest { static { assert(true); } }'
115 failcode='class conftestfail<T> { T foo() { return null; } }' ;;
116 1.5) goodcode='class conftest<T> { T foo() { return null; } }'
117 failcode='class conftestfail syntax error' ;;
118 *) AC_MSG_ERROR([invalid source-version argument to gt_@&t@JAVACOMP: $source_version]) ;;
120 case "$target_version" in
127 *) AC_MSG_ERROR([invalid target-version argument to gt_@&t@JAVACOMP: $target_version]) ;;
129 # Function to output the classfile version of a file (8th byte) in decimal.
130 if od -A x < /dev/null >/dev/null 2>/dev/null; then
132 func_classfile_version ()
134 od -A n -t d1 -j 7 -N 1 "[$]1"
138 func_classfile_version ()
140 dd if="[$]1" bs=1 count=1 skip=7 2>/dev/null | hexdump -e '1/1 "%3d "'
144 AC_MSG_CHECKING([for Java compiler])
146 dnl The support of GNU gcj for target-version and source-version:
148 dnl gcj 3.0.4 to 4.1 does not have a way to specify the target-version.
149 dnl It always assumes target-version=1.4 but labels the class files as 1.1.
150 dnl One consequence of this is that gcj compiles GetURL.java to invalid
151 dnl bytecode, which crashes with a VerifyError when executed by Sun Java
152 dnl 1.3.1. The bug is registered as java/7066, see
153 dnl http://gcc.gnu.org/bugzilla/show_bug.cgi?id=7066
154 dnl FIXME: Check new versions of gcj as they come out.
156 dnl For gcj < 3.3, the source-version always is 1.3.
157 dnl For gcj >= 3.3, the source-version defaults to 1.4; option
158 dnl "-fno-assert" switches to source-version 1.3.
160 dnl The support of Sun javac for target-version and source-version:
162 dnl javac 1.3: -target 1.1 1.2 1.3 default: 1.1
163 dnl source always: 1.3
165 dnl javac 1.4: -target 1.1 1.2 1.3 1.4 default: 1.2
166 dnl -source 1.3 1.4 default: 1.3
167 dnl -target 1.1/1.2/1.3 only possible with -source 1.3 or no -source
169 dnl javac 1.5: -target 1.1 1.2 1.3 1.4 1.5 default: 1.5
170 dnl -source 1.3 1.4 1.5 default: 1.5
171 dnl -target 1.1/1.2/1.3 only possible with -source 1.3
172 dnl -target 1.4 only possible with -source 1.3/1.4
174 dnl javac 1.6: -target 1.1 1.2 1.3 1.4 1.5 1.6 default: 1.6
175 dnl -source 1.3 1.4 1.5 1.6 default: 1.5
176 dnl -target 1.1/1.2/1.3 only possible with -source 1.3
177 dnl -target 1.4 only possible with -source 1.3/1.4
178 dnl -target 1.5 only possible with -source 1.3/1.4/1.5 or no -source
180 dnl The support of jikes for target-version and source-version:
182 dnl jikes 1.14 does not have a way to specify the target-version. It
183 dnl always assumes target-version=1.1.
185 dnl For jikes 1.14, the source-version always is 1.3.
194 cat > conftestlib.java <<EOF
195 public class conftestlib {
196 public static void main (String[] args) {
201 echo "$goodcode" > conftest.java
202 echo "$failcode" > conftestfail.java
203 dnl If the user has set the JAVAC environment variable, use that, if it
204 dnl satisfies the constraints (possibly after adding -target and -source
206 if test -n "$JAVAC"; then
207 dnl Try the original $JAVAC.
208 if $JAVAC --version 2>/dev/null | sed -e 1q | grep gcj > /dev/null; then
209 dnl It's a version of gcj. Ignore the version of conftest.class.
210 if test "$target_version" = 1.4 && test "$source_version" = 1.4; then
213 if { echo "$as_me:__oline__: $JAVAC -d . conftest.java" >&AS_MESSAGE_LOG_FD
214 $JAVAC -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
216 && test -f conftest.class; then
222 if test "$target_version" = 1.4 && test "$source_version" = 1.3; then
223 dnl Try $JAVAC and "$JAVAC -fno-assert". But add -fno-assert only if
224 dnl it makes a difference. (It could already be part of $JAVAC.)
227 if { echo "$as_me:__oline__: $JAVAC -d . conftest.java" >&AS_MESSAGE_LOG_FD
228 $JAVAC -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
230 && test -f conftest.class; then
233 javac_noassert_works=
235 if { echo "$as_me:__oline__: $JAVAC -fno-assert -d . conftest.java" >&AS_MESSAGE_LOG_FD
236 $JAVAC -fno-assert -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
238 && test -f conftest.class; then
239 javac_noassert_works=1
241 if test -n "$javac_works" && test -n "$javac_noassert_works"; then
242 rm -f conftestfail.class
243 if { echo "$as_me:__oline__: $JAVAC -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
244 $JAVAC -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
246 && test -f conftestfail.class \
247 && ! { echo "$as_me:__oline__: $JAVAC -fno-assert -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
248 $JAVAC -fno-assert -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
250 dnl "$JAVAC -fno-assert" works better than $JAVAC.
254 if test -n "$javac_works"; then
259 if test -n "$javac_noassert_works"; then
260 CONF_JAVAC="$JAVAC -fno-assert"
268 dnl It's not gcj. Assume the classfile versions are correct.
271 if { echo "$as_me:__oline__: $JAVAC -d . conftest.java" >&AS_MESSAGE_LOG_FD
272 $JAVAC -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
274 && test -f conftest.class \
275 && expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD; then
276 dnl Try adding -source option if it is useful.
278 rm -f conftestfail.class
279 if { echo "$as_me:__oline__: $JAVAC -source $source_version -d . conftest.java" >&AS_MESSAGE_LOG_FD
280 $JAVAC -source "$source_version" -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
282 && test -f conftest.class \
283 && expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD \
284 && { echo "$as_me:__oline__: $JAVAC -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
285 $JAVAC -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
287 && test -f conftestfail.class \
288 && ! { echo "$as_me:__oline__: $JAVAC -source $source_version -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
289 $JAVAC -source "$source_version" -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
291 CONF_JAVAC="$JAVAC -source $source_version"
300 dnl Try with -target option alone. (Sun javac 1.3.1 has the -target
301 dnl option but no -source option.)
303 if { echo "$as_me:__oline__: $JAVAC -target $target_version -d . conftest.java" >&AS_MESSAGE_LOG_FD
304 $JAVAC -target "$target_version" -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
306 && test -f conftest.class \
307 && expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD; then
308 dnl Try adding -source option if it is useful.
310 rm -f conftestfail.class
311 if { echo "$as_me:__oline__: $JAVAC -target $target_version -source $source_version -d . conftest.java" >&AS_MESSAGE_LOG_FD
312 $JAVAC -target "$target_version" -source "$source_version" -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
314 && test -f conftest.class \
315 && expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD \
316 && { echo "$as_me:__oline__: $JAVAC -target $target_version -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
317 $JAVAC -target "$target_version" -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
319 && test -f conftestfail.class \
320 && ! { echo "$as_me:__oline__: $JAVAC -target $target_version -source $source_version -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
321 $JAVAC -target "$target_version" -source "$source_version" -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
323 CONF_JAVAC="$JAVAC -target $target_version -source $source_version"
327 CONF_JAVAC="$JAVAC -target $target_version"
332 dnl Maybe this -target option requires a -source option? Try with
333 dnl -target and -source options. (Supported by Sun javac 1.4 and
336 if { echo "$as_me:__oline__: $JAVAC -target $target_version -source $source_version -d . conftest.java" >&AS_MESSAGE_LOG_FD
337 $JAVAC -target "$target_version" -source "$source_version" -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
339 && test -f conftest.class \
340 && expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD; then
341 CONF_JAVAC="$JAVAC -target $target_version -source $source_version"
349 if test -z "$HAVE_JAVACOMP"; then
350 pushdef([AC_MSG_CHECKING],[:])dnl
351 pushdef([AC_CHECKING],[:])dnl
352 pushdef([AC_MSG_RESULT],[:])dnl
353 AC_CHECK_PROG(HAVE_GCJ_IN_PATH, gcj, yes)
354 AC_CHECK_PROG(HAVE_JAVAC_IN_PATH, javac, yes)
355 AC_CHECK_PROG(HAVE_JIKES_IN_PATH, jikes, yes)
356 popdef([AC_MSG_RESULT])dnl
357 popdef([AC_CHECKING])dnl
358 popdef([AC_MSG_CHECKING])dnl
359 if test -z "$HAVE_JAVACOMP" && test -n "$HAVE_GCJ_IN_PATH"; then
360 dnl Test for a good gcj version (>= 3.0).
362 if gcj --version 2>/dev/null | sed -e 's,^[^0-9]*,,' -e 1q | sed -e '/^3\.[01]/d' | grep '^[3-9]' >/dev/null; then
364 dnl See if libgcj.jar is well installed.
365 if { echo "$as_me:__oline__: gcj -C -d . conftestlib.java" >&AS_MESSAGE_LOG_FD
366 gcj -C -d . conftestlib.java >&AS_MESSAGE_LOG_FD 2>&1
369 dnl Now test whether it supports the desired target-version and
370 dnl source-version. But ignore the version of conftest.class.
371 if test "$target_version" = 1.4 && test "$source_version" = 1.4; then
373 if { echo "$as_me:__oline__: gcj -C -d . conftest.java" >&AS_MESSAGE_LOG_FD
374 gcj -C -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
376 && test -f conftest.class; then
382 if test "$target_version" = 1.4 && test "$source_version" = 1.3; then
383 dnl Try gcj and "gcj -fno-assert". But add -fno-assert only if
384 dnl it works (not gcj < 3.3).
386 if { echo "$as_me:__oline__: gcj -C -fno-assert -d . conftest.java" >&AS_MESSAGE_LOG_FD
387 gcj -C -fno-assert -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
389 && test -f conftest.class; then
390 CONF_JAVAC="gcj -C -fno-assert"
395 if { echo "$as_me:__oline__: gcj -C -d . conftest.java" >&AS_MESSAGE_LOG_FD
396 gcj -C -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
398 && test -f conftest.class; then
409 if test -z "$HAVE_JAVACOMP" && test -n "$HAVE_JAVAC_IN_PATH"; then
410 dnl Test whether javac is usable.
411 if { javac -version >/dev/null 2>/dev/null || test $? -le 2; } \
412 && ( if javac -help 2>&1 >/dev/null | grep at.dms.kjc.Main >/dev/null && javac -help 2>/dev/null | grep 'released.*2000' >/dev/null ; then exit 1; else exit 0; fi ); then
414 dnl Now test whether it supports the desired target-version and
417 if { echo "$as_me:__oline__: javac -d . conftest.java" >&AS_MESSAGE_LOG_FD
418 javac -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
420 && test -f conftest.class \
421 && expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD; then
422 dnl Try adding -source option if it is useful.
424 rm -f conftestfail.class
425 if { echo "$as_me:__oline__: javac -source $source_version -d . conftest.java" >&AS_MESSAGE_LOG_FD
426 javac -source "$source_version" -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
428 && test -f conftest.class \
429 && expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD \
430 && { echo "$as_me:__oline__: javac -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
431 javac -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
433 && test -f conftestfail.class \
434 && ! { echo "$as_me:__oline__: javac -source $source_version -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
435 javac -source "$source_version" -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
437 CONF_JAVAC="javac -source $source_version"
446 dnl Try with -target option alone. (Sun javac 1.3.1 has the -target
447 dnl option but no -source option.)
449 if { echo "$as_me:__oline__: javac -target $target_version -d . conftest.java" >&AS_MESSAGE_LOG_FD
450 javac -target "$target_version" -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
452 && test -f conftest.class \
453 && expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD; then
454 dnl Try adding -source option if it is useful.
456 rm -f conftestfail.class
457 if { echo "$as_me:__oline__: javac -target $target_version -source $source_version -d . conftest.java" >&AS_MESSAGE_LOG_FD
458 javac -target "$target_version" -source "$source_version" -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
460 && test -f conftest.class \
461 && expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD \
462 && { echo "$as_me:__oline__: javac -target $target_version -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
463 javac -target "$target_version" -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
465 && test -f conftestfail.class \
466 && ! { echo "$as_me:__oline__: javac -target $target_version -source $source_version -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
467 javac -target "$target_version" -source "$source_version" -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
469 CONF_JAVAC="javac -target $target_version -source $source_version"
473 CONF_JAVAC="javac -target $target_version"
478 dnl Maybe this -target option requires a -source option? Try with
479 dnl -target and -source options. (Supported by Sun javac 1.4 and
482 if { echo "$as_me:__oline__: javac -target $target_version -source $source_version -d . conftest.java" >&AS_MESSAGE_LOG_FD
483 javac -target "$target_version" -source "$source_version" -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
485 && test -f conftest.class \
486 && expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD; then
487 CONF_JAVAC="javac -target $target_version -source $source_version"
495 if test -z "$HAVE_JAVACOMP" && test -n "$HAVE_JIKES_IN_PATH"; then
496 dnl Test whether jikes is usable.
497 if { jikes >/dev/null 2>/dev/null || test $? = 1; } \
499 # See if the existing CLASSPATH is sufficient to make jikes work.
501 jikes conftestlib.java >&AS_MESSAGE_LOG_FD 2>&1
503 rm -f conftestlib.class
507 dnl Now test whether it supports the desired target-version and
509 if test "$source_version" = 1.3; then
517 rm -f conftest*.java conftest*.class
518 if test -n "$HAVE_JAVACOMP"; then
519 ac_result="$CONF_JAVAC"
523 AC_MSG_RESULT([$ac_result])
526 AC_SUBST(CLASSPATH_SEPARATOR)
527 AC_SUBST(HAVE_JAVAC_ENVVAR)