be more specific about depcheck errors (show whether compile or link stage failed)

diff --git a/Makefile b/Makefile
index a300b6af4e9d861f38d252f4611f4e1381d232f5..6319795c66c0fd59d24c1cd510a6c9b2e7c24197 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -304,11 +304,20 @@ dependencies-check:
        { \
                $(ECHO_NOLF) "Checking for $$2 ($$1)... "; \
                if \
-                       $(CXX) conftest.cpp $(CFLAGS) $(CXXFLAGS) $(CFLAGS_COMMON) $(CXXFLAGS_COMMON) $(CPPFLAGS) $(CPPFLAGS_COMMON) $$4 -DCONFTEST_HEADER="<$$2>" -DCONFTEST_SYMBOL="$$3" $(TARGET_ARCH) $(LDFLAGS) -c -o conftest.o >&3 $(STDERR_TO_STDOUT) && \
-                       $(CXX) conftest.o $(LDFLAGS) $(LDFLAGS_COMMON) $$5 $(LIBS_COMMON) $(LIBS) -o conftest >&3 $(STDERR_TO_STDOUT); \
+                       $(CXX) conftest.cpp $(CFLAGS) $(CXXFLAGS) $(CFLAGS_COMMON) $(CXXFLAGS_COMMON) $(CPPFLAGS) $(CPPFLAGS_COMMON) $$4 -DCONFTEST_HEADER="<$$2>" -DCONFTEST_SYMBOL="$$3" $(TARGET_ARCH) $(LDFLAGS) -c -o conftest.o >&3 $(STDERR_TO_STDOUT); \
                then \
-                       $(RM) conftest conftest.o conftest.d; \
-                       $(ECHO) "found."; \
+                       if \
+                               $(CXX) conftest.o $(LDFLAGS) $(LDFLAGS_COMMON) $$5 $(LIBS_COMMON) $(LIBS) -o conftest >&3 $(STDERR_TO_STDOUT); \
+                       then \
+                               $(RM) conftest conftest.o conftest.d; \
+                               $(ECHO) "found and links."; \
+                       else \
+                               $(RM) conftest.o conftest.d; \
+                               $(ECHO) "found but does not link, please install it or set PKG_CONFIG_PATH right!"; \
+                               $(ECHO) "To see the failed commands, set DEPENDENCIES_CHECK=verbose"; \
+                               $(ECHO) "To proceed anyway, set DEPENDENCIES_CHECK=off"; \
+                               failed=1; \
+                       fi; \
                else \
                        $(RM) conftest conftest.o conftest.d; \
                        $(ECHO) "not found, please install it or set PKG_CONFIG_PATH right!"; \