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-rw-r--r--Build/source/utils/xindy-new/configure.ac8
1 files changed, 7 insertions, 1 deletions
diff --git a/Build/source/utils/xindy-new/configure.ac b/Build/source/utils/xindy-new/configure.ac
index 6856416ec61..6fdee54ffdc 100644
--- a/Build/source/utils/xindy-new/configure.ac
+++ b/Build/source/utils/xindy-new/configure.ac
@@ -118,10 +118,16 @@ else
fi
AC_SUBST([CONVERT_FROM_UTF8])
+# No checks for header files. We use stdio.h, unistd.h, and string.h.
+# Today, they are universally available if a C compiler is installed.
+
# Checks for typedefs, structures, and compiler characteristics.
# Checks for library functions.
-AC_CHECK_FUNCS([strrchr strtoul])
+# The code in tex2indy.l simply assumes that strtoul() is there, would
+# need a replacement.
+AC_CHECK_FUNCS([strtoul], [],
+ [AC_MSG_ERROR([strtoul() is needed])])
echo timestamp >config.force
fi