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-rw-r--r--polly/autoconf/configure.ac3
1 files changed, 3 insertions, 0 deletions
diff --git a/polly/autoconf/configure.ac b/polly/autoconf/configure.ac
index 67e53b35398..d5d705fc7ce 100644
--- a/polly/autoconf/configure.ac
+++ b/polly/autoconf/configure.ac
@@ -95,6 +95,9 @@ dnl **************************************************************************
dnl * Create the output files
dnl **************************************************************************
+dnl Let ISL's configure generate isl_config.h and gitversion.h
+AC_CONFIG_SUBDIRS(lib/External/isl)
+
dnl This must be last
AC_CONFIG_HEADERS(include/polly/Config/config.h)
AC_OUTPUT
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