Add feature test macro _POSIX_C_SOURCE to enable fileno()

Flex prior to 2.6.6 uses fileno() but does not define the needed feature test macros. See westes/flex#263 for details. Signed-off-by: Joseph Schuchart <[email protected]>
open-mpi · Jul 10, 2024 · 7e14e2b · 7e14e2b
1 parent f64f37b
commit 7e14e2b
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diff --git a/opal/util/Makefile.am b/opal/util/Makefile.am
@@ -131,6 +131,12 @@ libopalutil_core_la_LIBADD = \
 libopalutil_core_la_DEPENDENCIES = \
         keyval/libopalutilkeyval.la
 
+# flex prior to version 2.6.6 uses the POSIX extension fileno()
+# without providing the proper feature test macro, so
+# we add the _POSIX_C_SOURCE macro here.
+# See https://github.com/westes/flex/issues/263
+libopalutil_core_la_CFLAGS = -D_POSIX_C_SOURCE=200809L
+
 # Conditionally install the header files
 
 if WANT_INSTALL_HEADERS

diff --git a/opal/util/keyval/Makefile.am b/opal/util/keyval/Makefile.am
@@ -30,5 +30,11 @@ libopalutilkeyval_la_SOURCES = \
 	keyval_lex.h \
         keyval_lex.l
 
+# flex prior to version 2.6.6 uses the POSIX extension fileno()
+# without providing the proper feature test macro, so
+# we add the _POSIX_C_SOURCE macro here.
+# See https://github.com/westes/flex/issues/263
+libopalutilkeyval_la_CFLAGS = -D_POSIX_C_SOURCE=200809L
+
 maintainer-clean-local:
 	rm -f keyval_lex.c