From 30148b33b5d750702d7749ac59d8d740d8cb7024 Mon Sep 17 00:00:00 2001
From: Marek Vasut <marex@denx.de>
Date: Thu, 3 Jun 2021 19:10:40 +0200
Subject: [PATCH] nss: Fix build on Centos 7

Centos 7 has glibc 2.18 and nss-native build fails due to implicit
declaration of function putenv during build. This is because of the
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

  putenv(): _XOPEN_SOURCE
      || /* Glibc since 2.19: */ _DEFAULT_SOURCE
      || /* Glibc versions <= 2.19: */ _SVID_SOURCE

and because nss coreconf/Linux.mk only defines

 -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_POSIX_SOURCE

So on such system with glibc 2.18, neither macro makes putenv()
available. Add -D_XOPEN_SOURCE for the Centos 7 and glibc 2.18
native build case.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Armin Kuster <akuster808@gmail.com>
Cc: Armin Kuster <akuster@mvista.com>
Cc: Khem Raj <raj.khem@gmail.com>
Cc: Richard Purdie <richard.purdie@linuxfoundation.org>
Cc: Ross Burton <ross.burton@arm.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 meta-oe/recipes-support/nss/nss_3.64.bb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/meta-oe/recipes-support/nss/nss_3.64.bb b/meta-oe/recipes-support/nss/nss_3.64.bb
index fce5a856ee..d4d7a87338 100644
--- a/meta-oe/recipes-support/nss/nss_3.64.bb
+++ b/meta-oe/recipes-support/nss/nss_3.64.bb
@@ -45,6 +45,8 @@ TDS = "${S}/tentative-dist-staging"
 
 TARGET_CC_ARCH += "${LDFLAGS}"
 
+CFLAGS_append_class-native = " -D_XOPEN_SOURCE "
+
 do_configure_prepend_libc-musl () {
     sed -i -e '/-DHAVE_SYS_CDEFS_H/d' ${S}/nss/lib/dbm/config/config.mk
 }