configure: query pkg-config for deps of static libs

note that pkg-config is a tad stupid: it won't tell us if the package is
built statically, but one needs to explicitly ask it to output
transitive deps for static packages. we can do that, as we resolve the
pkg-config output to actual libraries, so we know if they are static.
always asking it would print the transitive deps also if we found a
dynamically linked library, which would inappropriately extend the link
interface. the latter actually happens on windows (because we can't
easily tell apart real static libs from import libs), but that doesn't
matter, as under windows, the linker transitively resolves dlls anyway.

Change-Id: If1be3b3df476374d5c8e62f4b185477c988223b3
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

1 files changed, 7 insertions, 0 deletions

diff --git a/mkspecs/features/qt_configure.prf b/mkspecs/features/qt_configure.prf
index 44d8a3e639..d75365cd0a 100644
--- a/mkspecs/features/qt_configure.prf
+++ b/mkspecs/features/qt_configure.prf
@@ -709,6 +709,13 @@ defineTest(qtConfLibrary_pkgConfig) {
     eval(libs = $$libpaths $$libs)
     !qtConfResolveLibs($${1}.libs, $$libs): \
         return(false)
+    contains($${1}.libs, ".*\\.$${QMAKE_EXTENSION_STATICLIB}$") {
+        qtRunLoggedCommand("$$pkg_config --static --libs-only-L $$args", libpaths)|return(false)
+        qtRunLoggedCommand("$$pkg_config --static --libs-only-l $$args", libs)|return(false)
+        eval(libs = $$libpaths $$libs)
+        !qtConfResolveLibs($${1}.libs, $$libs): \
+            return(false)
+    }
 
     qtRunLoggedCommand("$$pkg_config --cflags $$args", $${1}.cflags)|return(false)
     # Split CFLAGS into stuff that goes into DEFINES, INCLUDEPATH, and other stuff.