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-rw-r--r--converters/iconv/Makefile5
1 files changed, 5 insertions, 0 deletions
diff --git a/converters/iconv/Makefile b/converters/iconv/Makefile
index 7ecb8c13d9a6..c2f75a272798 100644
--- a/converters/iconv/Makefile
+++ b/converters/iconv/Makefile
@@ -21,6 +21,11 @@ MANCOMPRESSED= yes
MAN1= biconv.1
MAN3= biconv.3 biconv_open.3 biconv_close.3
+.ifdef USE_ICONV
+.error USE_ICONV is defined as an environment variable, or in the arguments \
+ to "make". Please unset it and restart the build.
+.endif
+
.if defined(NOPROFILE)
PLIST_SUB= PROFILE:="@comment "
.else