[PATCH] libstdc++: Add some makefile dependencies

[Jonathan Wakely]

This ensures that wstring-inst.o and similar files will be rebuilt when
string-inst.cc changes.

libstdc++-v3/ChangeLog:

	* src/c++11/Makefile.am: Add prerequisites for targets that
	depend on string-inst.cc.
	* src/c++11/Makefile.in: Regenerate.
---

We could make a lot of other changes like this, but for now I'm only
bothered by the one that affected me recently. We could also make .o
files depend on the headers they use, but that's a lot more work.

I've been using this in my local tree for a couple of weeks without
issues.

 libstdc++-v3/src/c++11/Makefile.am | 8 ++++++++
 libstdc++-v3/src/c++11/Makefile.in | 8 ++++++++
 2 files changed, 16 insertions(+)

diff --git a/libstdc++-v3/src/c++11/Makefile.am b/libstdc++-v3/src/c++11/Makefile.am
index b39115832e2..26d6fa0e01a 100644
--- a/libstdc++-v3/src/c++11/Makefile.am
+++ b/libstdc++-v3/src/c++11/Makefile.am
@@ -168,7 +168,15 @@ localename.lo: localename.cc
 localename.o: localename.cc
 	$(CXXCOMPILE) -fchar8_t -c $<
 
+wstring-inst.lo: wstring-inst.cc string-inst.cc
+wstring-inst.o: wstring-inst.cc string-inst.cc
+
 if ENABLE_DUAL_ABI
+cow-string-inst.lo: cow-string-inst.cc string-inst.cc
+cow-string-inst.o: cow-string-inst.cc string-inst.cc
+cow-wstring-inst.lo: cow-wstring-inst.cc string-inst.cc
+cow-wstring-inst.o: cow-wstring-inst.cc string-inst.cc
+
 # Rewrite the type info for __ios_failure.
 rewrite_ios_failure_typeinfo = sed -e '/^_*_ZTISt13__ios_failure:/,/_ZTVN10__cxxabiv120__si_class_type_infoE/s/_ZTVN10__cxxabiv120__si_class_type_infoE/_ZTVSt19__iosfail_type_info/'
 
diff --git a/libstdc++-v3/src/c++11/Makefile.in b/libstdc++-v3/src/c++11/Makefile.in
index 770e948a98a..dafdb260ec1 100644
--- a/libstdc++-v3/src/c++11/Makefile.in
+++ b/libstdc++-v3/src/c++11/Makefile.in
@@ -896,6 +896,14 @@ localename.lo: localename.cc
 localename.o: localename.cc
 	$(CXXCOMPILE) -fchar8_t -c $<
 
+wstring-inst.lo: wstring-inst.cc string-inst.cc
+wstring-inst.o: wstring-inst.cc string-inst.cc
+
+@ENABLE_DUAL_ABI_TRUE@cow-string-inst.lo: cow-string-inst.cc string-inst.cc
+@ENABLE_DUAL_ABI_TRUE@cow-string-inst.o: cow-string-inst.cc string-inst.cc
+@ENABLE_DUAL_ABI_TRUE@cow-wstring-inst.lo: cow-wstring-inst.cc string-inst.cc
+@ENABLE_DUAL_ABI_TRUE@cow-wstring-inst.o: cow-wstring-inst.cc string-inst.cc
+
 @ENABLE_DUAL_ABI_TRUE@cxx11-ios_failure-lt.s: cxx11-ios_failure.cc
 @ENABLE_DUAL_ABI_TRUE@	$(LTCXXCOMPILE) -gno-as-loc-support -S $< -o tmp-cxx11-ios_failure-lt.s
 @ENABLE_DUAL_ABI_TRUE@	-test -f tmp-cxx11-ios_failure-lt.o && mv -f tmp-cxx11-ios_failure-lt.o tmp-cxx11-ios_failure-lt.s
-- 
2.49.0