1 #
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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 #
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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
26 ###############################################################################
27 # Terminology used in this file:
28 #
29 # Valid features == All possible features that the JVM knows about.
30 # Deprecated features == Previously known features (not considered valid).
31 # Available features == Features that are possible to use in this configuration.
32 # Default features == Features that are on by default in this configuration.
33 # Enabled features == Features requested by the user to be present.
34 # Disabled features == Features excluded from being used by the user.
35 # Active features == The exact set of features to be used for a JVM variant.
36 #
37 # All valid features are considered available, unless listed as unavailable.
38 # All available features will be turned on as default, unless listed in a filter.
39 ###############################################################################
40
41 # We need these as m4 defines to be able to loop over them using m4 later on.
42
43 # All valid JVM features, regardless of platform
44 m4_define(jvm_features_valid, m4_normalize( \
45 ifdef([custom_jvm_features_valid], custom_jvm_features_valid) \
46 \
47 cds compiler1 compiler2 dtrace epsilongc g1gc jfr jni-check \
48 jvmci jvmti link-time-opt management minimal opt-size parallelgc \
49 serialgc services shenandoahgc static-build vm-structs zero zgc \
50 ))
51
52 # Deprecated JVM features (these are ignored, but with a warning)
53 m4_define(jvm_features_deprecated, m4_normalize(
54 cmsgc trace \
55 ))
56
57 # Feature descriptions
58 m4_define(jvm_feature_desc_cds, [enable class data sharing (CDS)])
59 m4_define(jvm_feature_desc_compiler1, [enable hotspot compiler C1])
60 m4_define(jvm_feature_desc_compiler2, [enable hotspot compiler C2])
61 m4_define(jvm_feature_desc_dtrace, [enable dtrace support])
62 m4_define(jvm_feature_desc_epsilongc, [include the epsilon (no-op) garbage collector])
63 m4_define(jvm_feature_desc_g1gc, [include the G1 garbage collector])
64 m4_define(jvm_feature_desc_jfr, [enable JDK Flight Recorder (JFR)])
65 m4_define(jvm_feature_desc_jni_check, [enable -Xcheck:jni support])
66 m4_define(jvm_feature_desc_jvmci, [enable JVM Compiler Interface (JVMCI)])
67 m4_define(jvm_feature_desc_jvmti, [enable Java Virtual Machine Tool Interface (JVM TI)])
68 m4_define(jvm_feature_desc_link_time_opt, [enable link time optimization])
69 m4_define(jvm_feature_desc_management, [enable java.lang.management API support])
70 m4_define(jvm_feature_desc_minimal, [support building variant 'minimal'])
71 m4_define(jvm_feature_desc_opt_size, [optimize the JVM library for size])
72 m4_define(jvm_feature_desc_parallelgc, [include the parallel garbage collector])
73 m4_define(jvm_feature_desc_serialgc, [include the serial garbage collector])
74 m4_define(jvm_feature_desc_services, [enable diagnostic services and client attaching])
75 m4_define(jvm_feature_desc_shenandoahgc, [include the Shenandoah garbage collector])
76 m4_define(jvm_feature_desc_static_build, [build static library instead of dynamic])
77 m4_define(jvm_feature_desc_vm_structs, [export JVM structures to the Serviceablility Agent])
78 m4_define(jvm_feature_desc_zero, [support building variant 'zero'])
79 m4_define(jvm_feature_desc_zgc, [include the Z garbage collector])
80
81 ###############################################################################
82 # Parse command line options for JVM feature selection. After this function
83 # has run $JVM_FEATURES_ENABLED, $JVM_FEATURES_DISABLED and $JVM_FEATURES_VALID
84 # can be used.
85 #
86 AC_DEFUN_ONCE([JVM_FEATURES_PARSE_OPTIONS],
87 [
88 # Setup shell variables from the m4 lists
89 UTIL_SORT_LIST(JVM_FEATURES_VALID, "jvm_features_valid")
90 UTIL_SORT_LIST(JVM_FEATURES_DEPRECATED, "jvm_features_deprecated")
91
92 # For historical reasons, some jvm features have their own, shorter names.
93 # Keep those as aliases for the --enable-jvm-feature-* style arguments.
94 UTIL_ALIASED_ARG_ENABLE(cds, --enable-jvm-feature-cds)
95 UTIL_ALIASED_ARG_ENABLE(dtrace, --enable-jvm-feature-dtrace)
96
97 # First check for features using the
98 # --with-jvm-features="<[-]feature>[,<[-]feature> ...]" syntax.
99 AC_ARG_WITH([jvm-features], [AS_HELP_STRING([--with-jvm-features],
100 [JVM features to enable (foo) or disable (-foo), separated by comma. Use
101 '--help' to show possible values @<:@none@:>@])])
102 if test "x$with_jvm_features" != x; then
103 # Replace "," with " ".
104 user_jvm_feature_list=${with_jvm_features//,/ }
105 JVM_FEATURES_ENABLED=`$ECHO $user_jvm_feature_list | \
106 $AWK '{ for (i=1; i<=NF; i++) if (!match($i, /^-.*/)) printf("%s ", $i) }'`
107 JVM_FEATURES_DISABLED=`$ECHO $user_jvm_feature_list | \
108 $AWK '{ for (i=1; i<=NF; i++) if (match($i, /^-.*/)) printf("%s ", substr($i, 2))}'`
109
110 # Verify that the user has provided only valid (or deprecated) features
111 UTIL_GET_NON_MATCHING_VALUES(invalid_features, $JVM_FEATURES_ENABLED \
112 $JVM_FEATURES_DISABLED, $JVM_FEATURES_VALID $JVM_FEATURES_DEPRECATED)
113 if test "x$invalid_features" != x; then
114 AC_MSG_NOTICE([Unknown JVM features specified: '$invalid_features'])
115 AC_MSG_NOTICE([The available JVM features are: '$JVM_FEATURES_VALID'])
116 AC_MSG_ERROR([Cannot continue])
117 fi
118
119 # Check if the user has provided deprecated features
120 UTIL_GET_MATCHING_VALUES(deprecated_features, $JVM_FEATURES_ENABLED \
121 $JVM_FEATURES_DISABLED, $JVM_FEATURES_DEPRECATED)
122 if test "x$deprecated_features" != x; then
123 AC_MSG_WARN([Deprecated JVM features specified (will be ignored): '$deprecated_features'])
124 # Filter out deprecated features
125 UTIL_GET_NON_MATCHING_VALUES(JVM_FEATURES_ENABLED, \
126 $JVM_FEATURES_ENABLED, $deprecated_features)
127 UTIL_GET_NON_MATCHING_VALUES(JVM_FEATURES_DISABLED, \
128 $JVM_FEATURES_DISABLED, $deprecated_features)
129 fi
130 fi
131
132 # Then check for features using the "--enable-jvm-feature-<feature>" syntax.
133 # Using m4, loop over all features with the variable FEATURE.
134 m4_foreach(FEATURE, m4_split(jvm_features_valid), [
135 # Create an m4 variable containing a shell variable name (like
136 # "enable_jvm_feature_static_build"), and the description.
137 m4_define(FEATURE_SHELL, [enable_jvm_feature_]m4_translit(FEATURE, -, _))
138 m4_define(FEATURE_DESCRIPTION, [jvm_feature_desc_]m4_translit(FEATURE, -, _))
139
140 AC_ARG_ENABLE(jvm-feature-FEATURE, AS_HELP_STRING(
141 [--enable-jvm-feature-FEATURE], [enable jvm feature 'FEATURE' (FEATURE_DESCRIPTION)]))
142
143 if test "x$FEATURE_SHELL" = xyes; then
144 JVM_FEATURES_ENABLED="$JVM_FEATURES_ENABLED FEATURE"
145 elif test "x$FEATURE_SHELL" = xno; then
146 JVM_FEATURES_DISABLED="$JVM_FEATURES_DISABLED FEATURE"
147 elif test "x$FEATURE_SHELL" != x; then
148 AC_MSG_ERROR([Invalid value for --enable-jvm-feature-FEATURE: '$FEATURE_SHELL'])
149 fi
150
151 m4_undefine([FEATURE_SHELL])
152 m4_undefine([FEATURE_DESCRIPTION])
153 ])
154
155 # Likewise, check for deprecated arguments.
156 m4_foreach(FEATURE, m4_split(jvm_features_deprecated), [
157 AC_ARG_ENABLE(jvm-feature-FEATURE, AS_HELP_STRING(
158 [--enable-jvm-feature-FEATURE],
159 [Deprecated. Option is kept for backwards compatibility and is ignored]))
160
161 m4_define(FEATURE_SHELL, [enable_jvm_feature_]m4_translit(FEATURE, -, _))
162
163 if test "x$FEATURE_SHELL" != x; then
164 AC_MSG_WARN([Deprecated JVM feature, will be ignored: --enable-jvm-feature-FEATURE])
165 fi
166
167 m4_undefine([FEATURE_SHELL])
168 ])
169
170 # Check if the user has both enabled and disabled a feature
171 UTIL_GET_MATCHING_VALUES(enabled_and_disabled, $JVM_FEATURES_ENABLED, \
172 $JVM_FEATURES_DISABLED)
173 if test "x$enabled_and_disabled" != x; then
174 AC_MSG_NOTICE([These feature are both enabled and disabled: '$enabled_and_disabled'])
175 AC_MSG_NOTICE([This can happen if you mix --with-jvm-features and --enable-jvm-feature-*])
176 AC_MSG_NOTICE([The recommendation is to only use --enable-jvm-feature-*])
177 AC_MSG_ERROR([Cannot continue])
178 fi
179
180 # Clean up lists and announce results to user
181 UTIL_SORT_LIST(JVM_FEATURES_ENABLED, $JVM_FEATURES_ENABLED)
182 AC_MSG_CHECKING([for JVM features enabled by the user])
183 if test "x$JVM_FEATURES_ENABLED" != x; then
184 AC_MSG_RESULT(['$JVM_FEATURES_ENABLED'])
185 else
186 AC_MSG_RESULT([none])
187 fi
188
189 UTIL_SORT_LIST(JVM_FEATURES_DISABLED, $JVM_FEATURES_DISABLED)
190 AC_MSG_CHECKING([for JVM features disabled by the user])
191 if test "x$JVM_FEATURES_DISABLED" != x; then
192 AC_MSG_RESULT(['$JVM_FEATURES_DISABLED'])
193 else
194 AC_MSG_RESULT([none])
195 fi
196
197 # Makefiles use VALID_JVM_FEATURES in check-jvm-feature to verify correctness.
198 VALID_JVM_FEATURES="$JVM_FEATURES_VALID"
199 AC_SUBST(VALID_JVM_FEATURES)
200 ])
201
202 ###############################################################################
203 # Helper function for the JVM_FEATURES_CHECK_* suite.
204 # The code in the code block should assign 'false' to the variable AVAILABLE
205 # if the feature is not available, and this function will handle everything
206 # else that is needed.
207 #
208 # arg 1: The name of the feature to test
209 # arg 2: The code block to execute
210 #
211 AC_DEFUN([JVM_FEATURES_CHECK_AVAILABILITY],
212 [
213 # Assume that feature is available
214 AVAILABLE=true
215
216 # Execute feature test block
217 $2
218
219 AC_MSG_CHECKING([if JVM feature '$1' is available])
220 if test "x$AVAILABLE" = "xtrue"; then
221 AC_MSG_RESULT([yes])
222 else
223 AC_MSG_RESULT([no])
224 JVM_FEATURES_PLATFORM_UNAVAILABLE="$JVM_FEATURES_PLATFORM_UNAVAILABLE $1"
225 fi
226 ])
227
228 ###############################################################################
229 # Check if the feature 'cds' is available on this platform.
230 #
231 AC_DEFUN_ONCE([JVM_FEATURES_CHECK_CDS],
232 [
233 JVM_FEATURES_CHECK_AVAILABILITY(cds, [
234 AC_MSG_CHECKING([if platform is supported by CDS])
235 if test "x$OPENJDK_TARGET_OS" = xaix; then
236 AC_MSG_RESULT([no, $OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU])
237 AVAILABLE=false
238 else
239 AC_MSG_RESULT([yes])
240 fi
241 ])
242 ])
243
244 ###############################################################################
245 # Check if the feature 'dtrace' is available on this platform.
246 #
247 AC_DEFUN_ONCE([JVM_FEATURES_CHECK_DTRACE],
248 [
249 JVM_FEATURES_CHECK_AVAILABILITY(dtrace, [
250 AC_MSG_CHECKING([for dtrace tool])
251 if test "x$DTRACE" != "x" && test -x "$DTRACE"; then
252 AC_MSG_RESULT([$DTRACE])
253 else
254 AC_MSG_RESULT([no])
255 AVAILABLE=false
256 fi
257
258 AC_CHECK_HEADERS([sys/sdt.h], [dtrace_headers_ok=true])
259 if test "x$dtrace_headers_ok" != "xtrue"; then
260 HELP_MSG_MISSING_DEPENDENCY([dtrace])
261 AC_MSG_NOTICE([Cannot enable dtrace with missing dependencies. See above.])
262 AVAILABLE=false
263 fi
264 ])
265 ])
266
267 ###############################################################################
268 # Check if the feature 'jvmci' is available on this platform.
269 #
270 AC_DEFUN_ONCE([JVM_FEATURES_CHECK_JVMCI],
271 [
272 JVM_FEATURES_CHECK_AVAILABILITY(jvmci, [
273 AC_MSG_CHECKING([if platform is supported by JVMCI])
274 if test "x$OPENJDK_TARGET_CPU" = "xx86_64"; then
275 AC_MSG_RESULT([yes])
276 elif test "x$OPENJDK_TARGET_CPU" = "xaarch64"; then
277 AC_MSG_RESULT([yes])
278 else
279 AC_MSG_RESULT([no, $OPENJDK_TARGET_CPU])
280 AVAILABLE=false
281 fi
282 ])
283 ])
284
285 ###############################################################################
286 # Check if the feature 'shenandoahgc' is available on this platform.
287 #
288 AC_DEFUN_ONCE([JVM_FEATURES_CHECK_SHENANDOAHGC],
289 [
290 JVM_FEATURES_CHECK_AVAILABILITY(shenandoahgc, [
291 AC_MSG_CHECKING([if platform is supported by Shenandoah])
292 if test "x$OPENJDK_TARGET_CPU_ARCH" = "xx86" || \
293 test "x$OPENJDK_TARGET_CPU" = "xaarch64" || \
294 test "x$OPENJDK_TARGET_CPU" = "xppc64le"; then
295 AC_MSG_RESULT([yes])
296 else
297 AC_MSG_RESULT([no, $OPENJDK_TARGET_CPU])
298 AVAILABLE=false
299 fi
300 ])
301 ])
302
303 ###############################################################################
304 # Check if the feature 'static-build' is available on this platform.
305 #
306 AC_DEFUN_ONCE([JVM_FEATURES_CHECK_STATIC_BUILD],
307 [
308 JVM_FEATURES_CHECK_AVAILABILITY(static-build, [
309 AC_MSG_CHECKING([if static-build is enabled in configure])
310 if test "x$STATIC_BUILD" = "xtrue"; then
311 AC_MSG_RESULT([yes])
312 else
313 AC_MSG_RESULT([no, use --enable-static-build to enable static build.])
314 AVAILABLE=false
315 fi
316 ])
317 ])
318
319 ###############################################################################
320 # Check if the feature 'zgc' is available on this platform.
321 #
322 AC_DEFUN_ONCE([JVM_FEATURES_CHECK_ZGC],
323 [
324 JVM_FEATURES_CHECK_AVAILABILITY(zgc, [
325 AC_MSG_CHECKING([if platform is supported by ZGC])
326 if test "x$OPENJDK_TARGET_CPU" = "xx86_64"; then
327 if test "x$OPENJDK_TARGET_OS" = "xlinux" || \
328 test "x$OPENJDK_TARGET_OS" = "xwindows" || \
329 test "x$OPENJDK_TARGET_OS" = "xmacosx"; then
330 AC_MSG_RESULT([yes])
331 else
332 AC_MSG_RESULT([no, $OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU])
333 AVAILABLE=false
334 fi
335 elif test "x$OPENJDK_TARGET_CPU" = "xaarch64"; then
336 if test "x$OPENJDK_TARGET_OS" = "xlinux" || \
337 test "x$OPENJDK_TARGET_OS" = "xwindows" || \
338 test "x$OPENJDK_TARGET_OS" = "xmacosx"; then
339 AC_MSG_RESULT([yes])
340 else
341 AC_MSG_RESULT([no, $OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU])
342 AVAILABLE=false
343 fi
344 elif test "x$OPENJDK_TARGET_CPU" = "xppc64le"; then
345 if test "x$OPENJDK_TARGET_OS" = "xlinux"; then
346 AC_MSG_RESULT([yes])
347 else
348 AC_MSG_RESULT([no, $OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU])
349 AVAILABLE=false
350 fi
351 else
352 AC_MSG_RESULT([no, $OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU])
353 AVAILABLE=false
354 fi
355
356 if test "x$OPENJDK_TARGET_OS" = "xwindows"; then
357 AC_MSG_CHECKING([if Windows APIs required for ZGC is present])
358 AC_COMPILE_IFELSE(
359 [AC_LANG_PROGRAM([[#include <windows.h>]],
360 [[struct MEM_EXTENDED_PARAMETER x;]])
361 ],
362 [
363 AC_MSG_RESULT([yes])
364 ],
365 [
366 AC_MSG_RESULT([no, missing required APIs])
367 AVAILABLE=false
368 ]
369 )
370 fi
371 ])
372 ])
373
374 ###############################################################################
375 # Setup JVM_FEATURES_PLATFORM_UNAVAILABLE and JVM_FEATURES_PLATFORM_FILTER
376 # to contain those features that are unavailable, or should be off by default,
377 # for this platform, regardless of JVM variant.
378 #
379 AC_DEFUN_ONCE([JVM_FEATURES_PREPARE_PLATFORM],
380 [
381 # The checks below should add unavailable features to
382 # JVM_FEATURES_PLATFORM_UNAVAILABLE.
383
384 JVM_FEATURES_CHECK_CDS
385 JVM_FEATURES_CHECK_DTRACE
386 JVM_FEATURES_CHECK_JVMCI
387 JVM_FEATURES_CHECK_SHENANDOAHGC
388 JVM_FEATURES_CHECK_STATIC_BUILD
389 JVM_FEATURES_CHECK_ZGC
390
391 ])
392
393 ###############################################################################
394 # Setup JVM_FEATURES_VARIANT_UNAVAILABLE and JVM_FEATURES_VARIANT_FILTER
395 # to contain those features that are unavailable, or should be off by default,
396 # for this particular JVM variant.
397 #
398 # arg 1: JVM variant
399 #
400 AC_DEFUN([JVM_FEATURES_PREPARE_VARIANT],
401 [
402 variant=$1
403
404 # Check which features are unavailable for this JVM variant.
405 # This means that is not possible to build these features for this variant.
406 if test "x$variant" = "xminimal"; then
407 JVM_FEATURES_VARIANT_UNAVAILABLE="cds zero"
408 elif test "x$variant" = "xcore"; then
409 JVM_FEATURES_VARIANT_UNAVAILABLE="cds minimal zero"
410 elif test "x$variant" = "xzero"; then
411 JVM_FEATURES_VARIANT_UNAVAILABLE="cds compiler1 compiler2 \
412 jvmci minimal zgc"
413 else
414 JVM_FEATURES_VARIANT_UNAVAILABLE="minimal zero"
415 fi
416
417 # Check which features should be off by default for this JVM variant.
418 if test "x$variant" = "xclient"; then
419 JVM_FEATURES_VARIANT_FILTER="compiler2 jvmci link-time-opt opt-size"
420 elif test "x$variant" = "xminimal"; then
421 JVM_FEATURES_VARIANT_FILTER="cds compiler2 dtrace epsilongc g1gc \
422 jfr jni-check jvmci jvmti management parallelgc services \
423 shenandoahgc vm-structs zgc"
424 if test "x$OPENJDK_TARGET_CPU" = xarm ; then
425 JVM_FEATURES_VARIANT_FILTER="$JVM_FEATURES_VARIANT_FILTER opt-size"
426 else
427 # Only arm-32 should have link-time-opt enabled as default.
428 JVM_FEATURES_VARIANT_FILTER="$JVM_FEATURES_VARIANT_FILTER \
429 link-time-opt"
430 fi
431 elif test "x$variant" = "xcore"; then
432 JVM_FEATURES_VARIANT_FILTER="compiler1 compiler2 jvmci \
433 link-time-opt opt-size"
434 elif test "x$variant" = "xzero"; then
435 JVM_FEATURES_VARIANT_FILTER="jfr link-time-opt opt-size"
436 else
437 JVM_FEATURES_VARIANT_FILTER="link-time-opt opt-size"
438 fi
439 ])
440
441 ###############################################################################
442 # Calculate the actual set of active JVM features for this JVM variant. Store
443 # the result in JVM_FEATURES_ACTIVE.
444 #
445 # arg 1: JVM variant
446 #
447 AC_DEFUN([JVM_FEATURES_CALCULATE_ACTIVE],
448 [
449 variant=$1
450
451 # The default is set to all valid features except those unavailable or listed
452 # in a filter.
453 if test "x$variant" != xcustom; then
454 UTIL_GET_NON_MATCHING_VALUES(default_for_variant, $JVM_FEATURES_VALID, \
455 $JVM_FEATURES_PLATFORM_UNAVAILABLE $JVM_FEATURES_VARIANT_UNAVAILABLE \
456 $JVM_FEATURES_PLATFORM_FILTER $JVM_FEATURES_VARIANT_FILTER)
457 else
458 # Except for the 'custom' variant, where the default is to start with an
459 # empty set.
460 default_for_variant=""
461 fi
462
463 # Verify that explicitly enabled features are available
464 UTIL_GET_MATCHING_VALUES(enabled_but_unavailable, $JVM_FEATURES_ENABLED, \
465 $JVM_FEATURES_PLATFORM_UNAVAILABLE $JVM_FEATURES_VARIANT_UNAVAILABLE)
466 if test "x$enabled_but_unavailable" != x; then
467 AC_MSG_NOTICE([ERROR: Unavailable JVM features explicitly enabled for '$variant': '$enabled_but_unavailable'])
468 AC_MSG_ERROR([Cannot continue])
469 fi
470
471 # Notify the user if their command line options has no real effect
472 UTIL_GET_MATCHING_VALUES(enabled_but_default, $JVM_FEATURES_ENABLED, \
473 $default_for_variant)
474 if test "x$enabled_but_default" != x; then
475 AC_MSG_NOTICE([Default JVM features explicitly enabled for '$variant': '$enabled_but_default'])
476 fi
477 UTIL_GET_MATCHING_VALUES(disabled_but_unavailable, $JVM_FEATURES_DISABLED, \
478 $JVM_FEATURES_PLATFORM_UNAVAILABLE $JVM_FEATURES_VARIANT_UNAVAILABLE)
479 if test "x$disabled_but_unavailable" != x; then
480 AC_MSG_NOTICE([Unavailable JVM features explicitly disabled for '$variant': '$disabled_but_unavailable'])
481 fi
482
483 # JVM_FEATURES_ACTIVE is the set of all default features and all explicitly
484 # enabled features, with the explicitly disabled features filtered out.
485 UTIL_GET_NON_MATCHING_VALUES(JVM_FEATURES_ACTIVE, $default_for_variant \
486 $JVM_FEATURES_ENABLED, $JVM_FEATURES_DISABLED)
487 ])
488
489 ###############################################################################
490 # Helper function for JVM_FEATURES_VERIFY. Check if the specified JVM
491 # feature is active. To be used in shell if constructs, like this:
492 # 'if JVM_FEATURES_IS_ACTIVE(jvmti); then'
493 #
494 # Definition kept in one line to allow inlining in if statements.
495 # Additional [] needed to keep m4 from mangling shell constructs.
496 AC_DEFUN([JVM_FEATURES_IS_ACTIVE],
497 [ [ [[ " $JVM_FEATURES_ACTIVE " =~ ' '$1' ' ]] ] ])
498
499 ###############################################################################
500 # Verify that the resulting set of features is consistent and legal.
501 #
502 # arg 1: JVM variant
503 #
504 AC_DEFUN([JVM_FEATURES_VERIFY],
505 [
506 variant=$1
507
508 if JVM_FEATURES_IS_ACTIVE(jvmci) && ! (JVM_FEATURES_IS_ACTIVE(compiler1) || \
509 JVM_FEATURES_IS_ACTIVE(compiler2)); then
510 AC_MSG_ERROR([Specified JVM feature 'jvmci' requires feature 'compiler2' or 'compiler1' for variant '$variant'])
511 fi
512
513 if JVM_FEATURES_IS_ACTIVE(jvmti) && ! JVM_FEATURES_IS_ACTIVE(services); then
514 AC_MSG_ERROR([Specified JVM feature 'jvmti' requires feature 'services' for variant '$variant'])
515 fi
516
517 # For backwards compatibility, disable a feature "globally" if one variant
518 # is missing the feature.
519 if ! JVM_FEATURES_IS_ACTIVE(cds); then
520 ENABLE_CDS="false"
521 fi
522 if ! JVM_FEATURES_IS_ACTIVE(jvmci); then
523 INCLUDE_JVMCI="false"
524 fi
525 if JVM_FEATURES_IS_ACTIVE(compiler2); then
526 INCLUDE_COMPILER2="true"
527 fi
528
529 # Verify that we have at least one gc selected (i.e., feature named "*gc").
530 if ! JVM_FEATURES_IS_ACTIVE(.*gc); then
531 AC_MSG_NOTICE([At least one gc needed for variant '$variant'.])
532 AC_MSG_NOTICE([Specified features: '$JVM_FEATURES_ACTIVE'])
533 AC_MSG_ERROR([Cannot continue])
534 fi
535 ])
536
537 ###############################################################################
538 # Set up all JVM features for each enabled JVM variant. Requires that
539 # JVM_FEATURES_PARSE_OPTIONS has been called.
540 #
541 AC_DEFUN_ONCE([JVM_FEATURES_SETUP],
542 [
543 # Set up variant-independent factors
544 JVM_FEATURES_PREPARE_PLATFORM
545
546 # For backwards compatibility, tentatively enable these features "globally",
547 # and disable them in JVM_FEATURES_VERIFY if a variant is found that are
548 # missing any of them.
549 ENABLE_CDS="true"
550 INCLUDE_JVMCI="true"
551 INCLUDE_COMPILER2="false"
552
553 for variant in $JVM_VARIANTS; do
554 # Figure out if any features are unavailable, or should be filtered out
555 # by default, for this variant.
556 # Store the result in JVM_FEATURES_VARIANT_UNAVAILABLE and
557 # JVM_FEATURES_VARIANT_FILTER.
558 JVM_FEATURES_PREPARE_VARIANT($variant)
559
560 # Calculate the resulting set of enabled features for this variant.
561 # The result is stored in JVM_FEATURES_ACTIVE.
562 JVM_FEATURES_CALCULATE_ACTIVE($variant)
563
564 # Verify consistency for JVM_FEATURES_ACTIVE.
565 JVM_FEATURES_VERIFY($variant)
566
567 # Keep feature list sorted and free of duplicates
568 UTIL_SORT_LIST(JVM_FEATURES_ACTIVE, $JVM_FEATURES_ACTIVE)
569 AC_MSG_CHECKING([JVM features to use for variant '$variant'])
570 AC_MSG_RESULT(['$JVM_FEATURES_ACTIVE'])
571
572 # Save this as e.g. JVM_FEATURES_server, using indirect variable
573 # referencing.
574 features_var_name=JVM_FEATURES_$variant
575 eval $features_var_name=\"$JVM_FEATURES_ACTIVE\"
576 done
577
578 # Unfortunately AC_SUBST does not work with non-literally named variables,
579 # so list all variants here.
580 AC_SUBST(JVM_FEATURES_server)
581 AC_SUBST(JVM_FEATURES_client)
582 AC_SUBST(JVM_FEATURES_minimal)
583 AC_SUBST(JVM_FEATURES_core)
584 AC_SUBST(JVM_FEATURES_zero)
585 AC_SUBST(JVM_FEATURES_custom)
586
587 AC_SUBST(INCLUDE_JVMCI)
588 AC_SUBST(INCLUDE_COMPILER2)
589
590 ])