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-rw-r--r--build/unix/elfhack/Makefile.in44
1 files changed, 44 insertions, 0 deletions
diff --git a/build/unix/elfhack/Makefile.in b/build/unix/elfhack/Makefile.in
new file mode 100644
index 0000000000..620f17f3c4
--- /dev/null
+++ b/build/unix/elfhack/Makefile.in
@@ -0,0 +1,44 @@
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+include $(topsrcdir)/config/rules.mk
+
+ifdef COMPILE_ENVIRONMENT
+test-array$(DLL_SUFFIX) test-ctors$(DLL_SUFFIX): %$(DLL_SUFFIX): %.$(OBJ_SUFFIX) elfhack
+ $(MKSHLIB) $(LDFLAGS) $< -nostartfiles
+ @echo ===
+ @echo === If you get failures below, please file a bug describing the error
+ @echo === and your environment \(compiler and linker versions\), and
+ @echo === provide the pre-elfhacked library as an attachment.
+ @echo === Use --disable-elf-hack until this is fixed.
+ @echo ===
+ # Fail if the library doesn't have $(DT_TYPE) .dynamic info
+ $(READELF) -d $@ | grep '($(DT_TYPE))'
+ @rm -f $@.bak
+ $(CURDIR)/elfhack -b -f $@
+ # Fail if the backup file doesn't exist
+ [ -f '$@.bak' ]
+ # Fail if the new library doesn't contain less relocations
+ [ $$($(READELF) -r $@.bak | wc -l) -gt $$($(READELF) -r $@ | wc -l) ]
+
+test-array$(DLL_SUFFIX) test-ctors$(DLL_SUFFIX): DSO_SONAME=$@
+test-array$(DLL_SUFFIX): DT_TYPE=INIT_ARRAY
+test-ctors$(DLL_SUFFIX): DT_TYPE=INIT
+
+libs:: test-array$(DLL_SUFFIX) test-ctors$(DLL_SUFFIX)
+
+.PRECIOUS: test-array$(DLL_SUFFIX) test-ctors$(DLL_SUFFIX)
+
+ifndef CROSS_COMPILE
+dummy: dummy.$(OBJ_SUFFIX)
+ $(CC) -o $@ $^ $(LDFLAGS)
+
+libs:: dummy
+ # Will either crash or return exit code 1 if elfhack is broken
+ LD_PRELOAD=$(CURDIR)/test-array$(DLL_SUFFIX) $(CURDIR)/dummy
+ LD_PRELOAD=$(CURDIR)/test-ctors$(DLL_SUFFIX) $(CURDIR)/dummy
+
+endif
+endif