qt: replace conflicts('%gcc@11:', when='@5.9:5.14') with -include limits (#27241)

Noting that missing numeric_limits was the cause of the compile issues
with gcc-11, I tested adding -include limits fixing @5.9:5.14%gcc@11.
Therefore, we can replace the conflicts('%gcc@11:', when='@5.9:5.14').

Co-authored-by: Bernhard Kaindl <bernhard.kaindl@ait.ac.at>

1 files changed, 6 insertions, 2 deletions

diff --git a/var/spack/repos/builtin/packages/qt/package.py b/var/spack/repos/builtin/packages/qt/package.py
index 3ae30033dc..2b96ddde3d 100644
--- a/var/spack/repos/builtin/packages/qt/package.py
+++ b/var/spack/repos/builtin/packages/qt/package.py
@@ -143,8 +143,7 @@ class Qt(Package):
           working_dir='qtwebsockets',
           when='@5.14: %gcc@11:')
     conflicts('%gcc@10:', when='@5.9:5.12.6 +opengl')
-    # Error: 'numeric_limits' is not a class template
-    conflicts('%gcc@11:', when='@5.8:5.14')
+    conflicts('%gcc@11:', when='@5.8')
 
     # Build-only dependencies
     depends_on("pkgconfig", type='build')
@@ -418,6 +417,11 @@ class Qt(Package):
         filter_file('^QMAKE_LFLAGS_NOUNDEF .*', 'QMAKE_LFLAGS_NOUNDEF = ',
                     conf('g++-unix'))
 
+        # https://gcc.gnu.org/gcc-11/porting_to.html: add -include limits
+        if self.spec.satisfies('@5.9:5.14%gcc@11:'):
+            with open(conf('gcc-base'), 'a') as f:
+                f.write("QMAKE_CXXFLAGS += -include limits\n")
+
         if self.spec.satisfies('@4'):
             # The gnu98 flag is necessary to build with GCC 6 and other modern
             # compilers (see http://stackoverflow.com/questions/10354371/);