X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/19ae0deb1c8c9475eb81daf7876cec5a44b5d5e0..4f35b2e8396097f20f71297cc759df56c4b25890:/configure.in

diff --git a/configure.in b/configure.in
index 7b681f6e6c..304f6ab2f9 100644
--- a/configure.in
+++ b/configure.in
@@ -3072,7 +3072,7 @@ test "${exec_prefix}" != NONE &&
 # the C preprocessor to some helpful value like 1, or maybe the empty
 # string.  Needless to say consequent macro substitutions are less
 # than conducive to the makefile finding the correct directory.
-[cpp_undefs="`echo $srcdir $configuration $canonical |
+[cpp_undefs="`echo $srcdir $configuration $canonical unix |
   sed -e 's/[^a-zA-Z0-9_]/ /g' -e 's/^/ /' -e 's/  *$//' \
   -e 's/  */ -U/g' -e 's/-U[0-9][^ ]*//g'`"]