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-rw-r--r--Makefile2
1 files changed, 2 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index 7052b46df8..cf7fa7a370 100644
--- a/Makefile
+++ b/Makefile
@@ -546,6 +546,7 @@ libof-check-installed-headers-c := testsuite
 $(objpfx)check-installed-headers-c.out: \
     scripts/check-installed-headers.sh $(headers)
 	$(SHELL) $(..)scripts/check-installed-headers.sh c $(supported-fortify) \
+	  $(config-cflags-charset-ascii) \
 	  "$(CC) $(filter-out -std=%,$(CFLAGS)) -D_ISOMAC $(+includes)" \
 	  $(headers) > $@; \
 	$(evaluate-test)
@@ -556,6 +557,7 @@ libof-check-installed-headers-cxx := testsuite
 $(objpfx)check-installed-headers-cxx.out: \
     scripts/check-installed-headers.sh $(headers)
 	$(SHELL) $(..)scripts/check-installed-headers.sh c++ $(supported-fortify) \
+	  $(config-cflags-charset-ascii) \
 	  "$(CXX) $(filter-out -std=%,$(CXXFLAGS)) -D_ISOMAC $(+includes)" \
 	  $(headers) > $@; \
 	$(evaluate-test)