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
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8 # particular file as subject to the "Classpath" exception as provided
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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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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" || \
295 test "x$OPENJDK_TARGET_CPU" = "xriscv64"; then
296 AC_MSG_RESULT([yes])
297 else
298 AC_MSG_RESULT([no, $OPENJDK_TARGET_CPU])
299 AVAILABLE=false
300 fi
301 ])
302 ])
303
304 ###############################################################################
305 # Check if the feature 'static-build' is available on this platform.
306 #
307 AC_DEFUN_ONCE([JVM_FEATURES_CHECK_STATIC_BUILD],
308 [
309 JVM_FEATURES_CHECK_AVAILABILITY(static-build, [
310 AC_MSG_CHECKING([if static-build is enabled in configure])
311 if test "x$STATIC_BUILD" = "xtrue"; then
312 AC_MSG_RESULT([yes])
313 else
314 AC_MSG_RESULT([no, use --enable-static-build to enable static build.])
315 AVAILABLE=false
316 fi
317 ])
318 ])
319
320 ###############################################################################
321 # Check if the feature 'zgc' is available on this platform.
322 #
323 AC_DEFUN_ONCE([JVM_FEATURES_CHECK_ZGC],
324 [
325 JVM_FEATURES_CHECK_AVAILABILITY(zgc, [
326 AC_MSG_CHECKING([if platform is supported by ZGC])
327 if test "x$OPENJDK_TARGET_CPU" = "xx86_64"; then
328 if test "x$OPENJDK_TARGET_OS" = "xlinux" || \
329 test "x$OPENJDK_TARGET_OS" = "xwindows" || \
330 test "x$OPENJDK_TARGET_OS" = "xmacosx"; then
331 AC_MSG_RESULT([yes])
332 else
333 AC_MSG_RESULT([no, $OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU])
334 AVAILABLE=false
335 fi
336 elif test "x$OPENJDK_TARGET_CPU" = "xaarch64"; then
337 if test "x$OPENJDK_TARGET_OS" = "xlinux" || \
338 test "x$OPENJDK_TARGET_OS" = "xwindows" || \
339 test "x$OPENJDK_TARGET_OS" = "xmacosx"; then
340 AC_MSG_RESULT([yes])
341 else
342 AC_MSG_RESULT([no, $OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU])
343 AVAILABLE=false
344 fi
345 elif test "x$OPENJDK_TARGET_CPU" = "xppc64le" || \
346 test "x$OPENJDK_TARGET_CPU" = "xriscv64"; then
347 if test "x$OPENJDK_TARGET_OS" = "xlinux"; then
348 AC_MSG_RESULT([yes])
349 else
350 AC_MSG_RESULT([no, $OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU])
351 AVAILABLE=false
352 fi
353 else
354 AC_MSG_RESULT([no, $OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU])
355 AVAILABLE=false
356 fi
357
358 if test "x$OPENJDK_TARGET_OS" = "xwindows"; then
359 AC_MSG_CHECKING([if Windows APIs required for ZGC is present])
360 AC_COMPILE_IFELSE(
361 [AC_LANG_PROGRAM([[#include <windows.h>]],
362 [[struct MEM_EXTENDED_PARAMETER x;]])
363 ],
364 [
365 AC_MSG_RESULT([yes])
366 ],
367 [
368 AC_MSG_RESULT([no, missing required APIs])
369 AVAILABLE=false
370 ]
371 )
372 fi
373 ])
374 ])
375
376 ###############################################################################
377 # Setup JVM_FEATURES_PLATFORM_UNAVAILABLE and JVM_FEATURES_PLATFORM_FILTER
378 # to contain those features that are unavailable, or should be off by default,
379 # for this platform, regardless of JVM variant.
380 #
381 AC_DEFUN_ONCE([JVM_FEATURES_PREPARE_PLATFORM],
382 [
383 # The checks below should add unavailable features to
384 # JVM_FEATURES_PLATFORM_UNAVAILABLE.
385
386 JVM_FEATURES_CHECK_CDS
387 JVM_FEATURES_CHECK_DTRACE
388 JVM_FEATURES_CHECK_JVMCI
389 JVM_FEATURES_CHECK_SHENANDOAHGC
390 JVM_FEATURES_CHECK_STATIC_BUILD
391 JVM_FEATURES_CHECK_ZGC
392
393 ])
394
395 ###############################################################################
396 # Setup JVM_FEATURES_VARIANT_UNAVAILABLE and JVM_FEATURES_VARIANT_FILTER
397 # to contain those features that are unavailable, or should be off by default,
398 # for this particular JVM variant.
399 #
400 # arg 1: JVM variant
401 #
402 AC_DEFUN([JVM_FEATURES_PREPARE_VARIANT],
403 [
404 variant=$1
405
406 # Check which features are unavailable for this JVM variant.
407 # This means that is not possible to build these features for this variant.
408 if test "x$variant" = "xminimal"; then
409 JVM_FEATURES_VARIANT_UNAVAILABLE="cds zero"
410 elif test "x$variant" = "xcore"; then
411 JVM_FEATURES_VARIANT_UNAVAILABLE="cds minimal zero"
412 elif test "x$variant" = "xzero"; then
413 JVM_FEATURES_VARIANT_UNAVAILABLE="cds compiler1 compiler2 \
414 jvmci minimal zgc"
415 else
416 JVM_FEATURES_VARIANT_UNAVAILABLE="minimal zero"
417 fi
418
419 # Check which features should be off by default for this JVM variant.
420 if test "x$variant" = "xclient"; then
421 JVM_FEATURES_VARIANT_FILTER="compiler2 jvmci link-time-opt opt-size"
422 elif test "x$variant" = "xminimal"; then
423 JVM_FEATURES_VARIANT_FILTER="cds compiler2 dtrace epsilongc g1gc \
424 jfr jni-check jvmci jvmti management parallelgc services \
425 shenandoahgc vm-structs zgc"
426 if test "x$OPENJDK_TARGET_CPU" = xarm ; then
427 JVM_FEATURES_VARIANT_FILTER="$JVM_FEATURES_VARIANT_FILTER opt-size"
428 else
429 # Only arm-32 should have link-time-opt enabled as default.
430 JVM_FEATURES_VARIANT_FILTER="$JVM_FEATURES_VARIANT_FILTER \
431 link-time-opt"
432 fi
433 elif test "x$variant" = "xcore"; then
434 JVM_FEATURES_VARIANT_FILTER="compiler1 compiler2 jvmci \
435 link-time-opt opt-size"
436 elif test "x$variant" = "xzero"; then
437 JVM_FEATURES_VARIANT_FILTER="jfr link-time-opt opt-size"
438 else
439 JVM_FEATURES_VARIANT_FILTER="link-time-opt opt-size"
440 fi
441 ])
442
443 ###############################################################################
444 # Calculate the actual set of active JVM features for this JVM variant. Store
445 # the result in JVM_FEATURES_ACTIVE.
446 #
447 # arg 1: JVM variant
448 #
449 AC_DEFUN([JVM_FEATURES_CALCULATE_ACTIVE],
450 [
451 variant=$1
452
453 # The default is set to all valid features except those unavailable or listed
454 # in a filter.
455 if test "x$variant" != xcustom; then
456 UTIL_GET_NON_MATCHING_VALUES(default_for_variant, $JVM_FEATURES_VALID, \
457 $JVM_FEATURES_PLATFORM_UNAVAILABLE $JVM_FEATURES_VARIANT_UNAVAILABLE \
458 $JVM_FEATURES_PLATFORM_FILTER $JVM_FEATURES_VARIANT_FILTER)
459 else
460 # Except for the 'custom' variant, where the default is to start with an
461 # empty set.
462 default_for_variant=""
463 fi
464
465 # Verify that explicitly enabled features are available
466 UTIL_GET_MATCHING_VALUES(enabled_but_unavailable, $JVM_FEATURES_ENABLED, \
467 $JVM_FEATURES_PLATFORM_UNAVAILABLE $JVM_FEATURES_VARIANT_UNAVAILABLE)
468 if test "x$enabled_but_unavailable" != x; then
469 AC_MSG_NOTICE([ERROR: Unavailable JVM features explicitly enabled for '$variant': '$enabled_but_unavailable'])
470 AC_MSG_ERROR([Cannot continue])
471 fi
472
473 # Notify the user if their command line options has no real effect
474 UTIL_GET_MATCHING_VALUES(enabled_but_default, $JVM_FEATURES_ENABLED, \
475 $default_for_variant)
476 if test "x$enabled_but_default" != x; then
477 AC_MSG_NOTICE([Default JVM features explicitly enabled for '$variant': '$enabled_but_default'])
478 fi
479 UTIL_GET_MATCHING_VALUES(disabled_but_unavailable, $JVM_FEATURES_DISABLED, \
480 $JVM_FEATURES_PLATFORM_UNAVAILABLE $JVM_FEATURES_VARIANT_UNAVAILABLE)
481 if test "x$disabled_but_unavailable" != x; then
482 AC_MSG_NOTICE([Unavailable JVM features explicitly disabled for '$variant': '$disabled_but_unavailable'])
483 fi
484
485 # JVM_FEATURES_ACTIVE is the set of all default features and all explicitly
486 # enabled features, with the explicitly disabled features filtered out.
487 UTIL_GET_NON_MATCHING_VALUES(JVM_FEATURES_ACTIVE, $default_for_variant \
488 $JVM_FEATURES_ENABLED, $JVM_FEATURES_DISABLED)
489 ])
490
491 ###############################################################################
492 # Helper function for JVM_FEATURES_VERIFY. Check if the specified JVM
493 # feature is active. To be used in shell if constructs, like this:
494 # 'if JVM_FEATURES_IS_ACTIVE(jvmti); then'
495 #
496 # Definition kept in one line to allow inlining in if statements.
497 # Additional [] needed to keep m4 from mangling shell constructs.
498 AC_DEFUN([JVM_FEATURES_IS_ACTIVE],
499 [ [ [[ " $JVM_FEATURES_ACTIVE " =~ ' '$1' ' ]] ] ])
500
501 ###############################################################################
502 # Verify that the resulting set of features is consistent and legal.
503 #
504 # arg 1: JVM variant
505 #
506 AC_DEFUN([JVM_FEATURES_VERIFY],
507 [
508 variant=$1
509
510 if JVM_FEATURES_IS_ACTIVE(jvmci) && ! (JVM_FEATURES_IS_ACTIVE(compiler1) || \
511 JVM_FEATURES_IS_ACTIVE(compiler2)); then
512 AC_MSG_ERROR([Specified JVM feature 'jvmci' requires feature 'compiler2' or 'compiler1' for variant '$variant'])
513 fi
514
515 if JVM_FEATURES_IS_ACTIVE(jvmti) && ! JVM_FEATURES_IS_ACTIVE(services); then
516 AC_MSG_ERROR([Specified JVM feature 'jvmti' requires feature 'services' for variant '$variant'])
517 fi
518
519 # For backwards compatibility, disable a feature "globally" if one variant
520 # is missing the feature.
521 if ! JVM_FEATURES_IS_ACTIVE(cds); then
522 ENABLE_CDS="false"
523 fi
524 if ! JVM_FEATURES_IS_ACTIVE(jvmci); then
525 INCLUDE_JVMCI="false"
526 fi
527 if JVM_FEATURES_IS_ACTIVE(compiler2); then
528 INCLUDE_COMPILER2="true"
529 fi
530
531 # Verify that we have at least one gc selected (i.e., feature named "*gc").
532 if ! JVM_FEATURES_IS_ACTIVE(.*gc); then
533 AC_MSG_NOTICE([At least one gc needed for variant '$variant'.])
534 AC_MSG_NOTICE([Specified features: '$JVM_FEATURES_ACTIVE'])
535 AC_MSG_ERROR([Cannot continue])
536 fi
537 ])
538
539 ###############################################################################
540 # Set up all JVM features for each enabled JVM variant. Requires that
541 # JVM_FEATURES_PARSE_OPTIONS has been called.
542 #
543 AC_DEFUN_ONCE([JVM_FEATURES_SETUP],
544 [
545 # Set up variant-independent factors
546 JVM_FEATURES_PREPARE_PLATFORM
547
548 # For backwards compatibility, tentatively enable these features "globally",
549 # and disable them in JVM_FEATURES_VERIFY if a variant is found that are
550 # missing any of them.
551 ENABLE_CDS="true"
552 INCLUDE_JVMCI="true"
553 INCLUDE_COMPILER2="false"
554
555 for variant in $JVM_VARIANTS; do
556 # Figure out if any features are unavailable, or should be filtered out
557 # by default, for this variant.
558 # Store the result in JVM_FEATURES_VARIANT_UNAVAILABLE and
559 # JVM_FEATURES_VARIANT_FILTER.
560 JVM_FEATURES_PREPARE_VARIANT($variant)
561
562 # Calculate the resulting set of enabled features for this variant.
563 # The result is stored in JVM_FEATURES_ACTIVE.
564 JVM_FEATURES_CALCULATE_ACTIVE($variant)
565
566 # Verify consistency for JVM_FEATURES_ACTIVE.
567 JVM_FEATURES_VERIFY($variant)
568
569 # Keep feature list sorted and free of duplicates
570 UTIL_SORT_LIST(JVM_FEATURES_ACTIVE, $JVM_FEATURES_ACTIVE)
571 AC_MSG_CHECKING([JVM features to use for variant '$variant'])
572 AC_MSG_RESULT(['$JVM_FEATURES_ACTIVE'])
573
574 # Save this as e.g. JVM_FEATURES_server, using indirect variable
575 # referencing.
576 features_var_name=JVM_FEATURES_$variant
577 eval $features_var_name=\"$JVM_FEATURES_ACTIVE\"
578 done
579
580 # Unfortunately AC_SUBST does not work with non-literally named variables,
581 # so list all variants here.
582 AC_SUBST(JVM_FEATURES_server)
583 AC_SUBST(JVM_FEATURES_client)
584 AC_SUBST(JVM_FEATURES_minimal)
585 AC_SUBST(JVM_FEATURES_core)
586 AC_SUBST(JVM_FEATURES_zero)
587 AC_SUBST(JVM_FEATURES_custom)
588
589 AC_SUBST(INCLUDE_JVMCI)
590 AC_SUBST(INCLUDE_COMPILER2)
591
592 ])