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-rw-r--r--gcc/config/i386/x-sco43
1 files changed, 3 insertions, 0 deletions
diff --git a/gcc/config/i386/x-sco4 b/gcc/config/i386/x-sco4
index 318943d63bf..145e40e08b4 100644
--- a/gcc/config/i386/x-sco4
+++ b/gcc/config/i386/x-sco4
@@ -5,3 +5,6 @@ CC = cc -nointl
# Seems to be needed with SCO DEV3.2v4.
X_CFLAGS = -D__STDC__=0
+
+# See all the declarations.
+FIXPROTO_DEFINES = -D_XOPEN_SOURCE
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