[Qemu-devel] [PATCH] configure: avoid polluting global CFLAGS with tasn1 flags

["Daniel P. Berrange" <berrange@redhat.com>]

The previous commit

  commit 9a2fd4347c40321f5cbb4ab4220e759fcbf87d03
  Author: Daniel P. Berrange <berrange@redhat.com>
  Date:   Mon Apr 13 14:01:39 2015 +0100

    crypto: add sanity checking of TLS x509 credentials

defined new variables $TEST_LIBS and $TEST_CFLAGS and
used them in tests/Makefile to augment $LIBS and $CFLAGS.

Unfortunately this overlooks the fact that tests/Makefile
is not executed via recursive-make, it is just pulled into
the top level Makefile via an include statement. So rather
than just augmenting the compiler/linker flags for tests
it polluted the global flags.

This is thought to be behind a reported failure when
building the pixman module as a sub-module, since global
$CFLAGS are passed down to configure in pixman.

This change removes the $TEST_LIBS and $TEST_CFLAGS
replacing them with $TASN1_LIBS and $TASN1_CFLAGS,
setting only against specific objects/executables
that need them.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
 configure      | 11 ++++-------
 tests/Makefile | 10 ++++++++--
 2 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/configure b/configure
index 52f5b79..f1011b5 100755
--- a/configure
+++ b/configure
@@ -415,9 +415,6 @@ if test "$debug_info" = "yes"; then
     LDFLAGS="-g $LDFLAGS"
 fi
 
-test_cflags=""
-test_libs=""
-
 # make source path absolute
 source_path=`cd "$source_path"; pwd`
 
@@ -2251,11 +2248,11 @@ fi
 # libtasn1 - only for the TLS creds/session test suite
 
 tasn1=yes
+tasn1_cflags=""
+tasn1_libs=""
 if $pkg_config --exists "libtasn1"; then
     tasn1_cflags=`$pkg_config --cflags libtasn1`
     tasn1_libs=`$pkg_config --libs libtasn1`
-    test_cflags="$test_cflags $tasn1_cflags"
-    test_libs="$test_libs $tasn1_libs"
 else
     tasn1=no
 fi
@@ -5257,8 +5254,8 @@ echo "EXESUF=$EXESUF" >> $config_host_mak
 echo "DSOSUF=$DSOSUF" >> $config_host_mak
 echo "LDFLAGS_SHARED=$LDFLAGS_SHARED" >> $config_host_mak
 echo "LIBS_QGA+=$libs_qga" >> $config_host_mak
-echo "TEST_LIBS=$test_libs" >> $config_host_mak
-echo "TEST_CFLAGS=$test_cflags" >> $config_host_mak
+echo "TASN1_LIBS=$tasn1_libs" >> $config_host_mak
+echo "TASN1_CFLAGS=$tasn1_cflags" >> $config_host_mak
 echo "POD2MAN=$POD2MAN" >> $config_host_mak
 echo "TRANSLATE_OPT_CFLAGS=$TRANSLATE_OPT_CFLAGS" >> $config_host_mak
 if test "$gcov" = "yes" ; then
diff --git a/tests/Makefile b/tests/Makefile
index 7c6025a..2b70391 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -360,8 +360,16 @@ tests/test-mul64$(EXESUF): tests/test-mul64.o $(test-util-obj-y)
 tests/test-bitops$(EXESUF): tests/test-bitops.o $(test-util-obj-y)
 tests/test-crypto-hash$(EXESUF): tests/test-crypto-hash.o $(test-crypto-obj-y)
 tests/test-crypto-cipher$(EXESUF): tests/test-crypto-cipher.o $(test-crypto-obj-y)
+
+tests/crypto-tls-x509-helpers.o-cflags := $(TASN1_CFLAGS)
+tests/crypto-tls-x509-helpers.o-libs := $(TASN1_LIBS)
+tests/pkix_asn1_tab.o-cflags := $(TASN1_CFLAGS)
+
+tests/test-crypto-tlscredsx509.o-cflags := $(TASN1_CFLAGS)
 tests/test-crypto-tlscredsx509$(EXESUF): tests/test-crypto-tlscredsx509.o \
 	tests/crypto-tls-x509-helpers.o tests/pkix_asn1_tab.o $(test-crypto-obj-y)
+
+tests/test-crypto-tlssession.o-cflags := $(TASN1_CFLAGS)
 tests/test-crypto-tlssession$(EXESUF): tests/test-crypto-tlssession.o \
 	tests/crypto-tls-x509-helpers.o tests/pkix_asn1_tab.o $(test-crypto-obj-y)
 
@@ -432,8 +440,6 @@ tests/test-write-threshold$(EXESUF): tests/test-write-threshold.o $(test-block-o
 ifeq ($(CONFIG_POSIX),y)
 LIBS += -lutil
 endif
-LIBS += $(TEST_LIBS)
-CFLAGS += $(TEST_CFLAGS)
 
 # QTest rules
 
-- 
2.4.3