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-rw-r--r--src/Makefile.Watcom6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/Makefile.Watcom b/src/Makefile.Watcom
index cae281e67..39a387ef7 100644
--- a/src/Makefile.Watcom
+++ b/src/Makefile.Watcom
@@ -47,6 +47,12 @@ CFLAGS += -d_WIN32_WINNT=0x0501 -dENABLE_IPV6
OBJ_DIR = WC_Win32.obj
LINK_ARG = $(OBJ_DIR)\wlink.arg
+# In order to process Makefile.inc wmake must be called with -u switch!
+!ifneq __MAKEOPTS__ -u
+!error You MUST call wmake with the -u switch!
+!else
+!include Makefile.inc
+!endif
# Unfortunately, we can't include Makefile.inc here because wmake doesn't
# use backslash as the line continuation character by default
CURL_SOURCES = main.c hugehelp.c urlglob.c writeout.c writeenv.c &