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-rw-r--r--configure.ac1
1 files changed, 1 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 878caea..5c0a0e8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -12,6 +12,7 @@ AC_PROG_MAKE_SET
# Checks for libraries.
# Checks for header files.
+AM_PROG_CC_C_O
AC_CONFIG_HEADER(config.h)
AC_CONFIG_HEADER(json_config.h)
AC_HEADER_STDC