Minor: Fix autoconf warning Before this change, autoconf was emitting the following warnings: ``` configure.ac:22: warning: AC_COMPILE_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS ../../lib/autoconf/specific.m4:368: AC_USE_SYSTEM_EXTENSIONS is expanded from... configure.ac:22: the top level configure.ac:22: warning: AC_RUN_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS ../../lib/autoconf/specific.m4:368: AC_USE_SYSTEM_EXTENSIONS is expanded from... configure.ac:22: the top level configure.ac:22: warning: AC_COMPILE_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS ../../lib/autoconf/specific.m4:368: AC_USE_SYSTEM_EXTENSIONS is expanded from... configure.ac:22: the top level configure.ac:22: warning: AC_RUN_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS ../../lib/autoconf/specific.m4:368: AC_USE_SYSTEM_EXTENSIONS is expanded from... configure.ac:22: the top level configure.ac:22: warning: AC_COMPILE_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS ../../lib/autoconf/specific.m4:368: AC_USE_SYSTEM_EXTENSIONS is expanded from... configure.ac:22: the top level configure.ac:22: warning: AC_RUN_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS ../../lib/autoconf/specific.m4:368: AC_USE_SYSTEM_EXTENSIONS is expanded from... configure.ac:22: the top level configure.ac:22: warning: AC_COMPILE_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS ../../lib/autoconf/specific.m4:368: AC_USE_SYSTEM_EXTENSIONS is expanded from... configure.ac:22: the top level configure.ac:22: warning: AC_RUN_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS ../../lib/autoconf/specific.m4:368: AC_USE_SYSTEM_EXTENSIONS is expanded from... configure.ac:22: the top level ```
diff --git a/configure.ac b/configure.ac index 4ebb21d..3aa41ff 100644 --- a/configure.ac +++ b/configure.ac
@@ -12,6 +12,7 @@ AM_INIT_AUTOMAKE([1.13.0 gnits tar-ustar dist-bzip2 no-dist-gzip -Wall no-define color-tests -Wno-portability]) AM_SILENT_RULES([yes]) AX_CODE_COVERAGE +AC_USE_SYSTEM_EXTENSIONS # Initialize libtool m4_ifdef([AM_PROG_AR], [AM_PROG_AR]) @@ -19,7 +20,6 @@ LT_INIT([disable-static]) # Check for programs -AC_USE_SYSTEM_EXTENSIONS AC_PROG_CC AC_PROG_CC_C99 AM_PROG_CC_C_O