File nss_fix.patch of Package waterfox-kde

Subject: [PATCH] Fix NSS build with glibc < 2.19

CentOS 7 has glibc 2.17 and NSS build fails due to implicit declaration of function putenv during build. This is because of the Feature Test Macro Requirements for glibc:
  putenv(): _XOPEN_SOURCE
      || /* Glibc since 2.19: */ _DEFAULT_SOURCE
      || /* Glibc versions <= 2.19: */ _SVID_SOURCE
and because security/nss/coreconf/Linux.mk only defines `-D_DEFAULT_SOURCE -D_BSD_SOURCE -D_POSIX_SOURCE`.
---
 security/nss/coreconf/Linux.mk    | 2 +-
 security/nss/coreconf/config.gypi | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/security/nss/coreconf/Linux.mk b/security/nss/coreconf/Linux.mk
index dcb432415fbe..2aa9cc69c273 100644
--- a/security/nss/coreconf/Linux.mk
+++ b/security/nss/coreconf/Linux.mk
@@ -22,7 +22,7 @@ ifeq ($(USE_PTHREADS),1)
 endif
 
 DEFAULT_COMPILER = gcc
-DEFINES += -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_POSIX_SOURCE -DSDB_MEASURE_USE_TEMP_DIR
+DEFINES += -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_SVID_SOURCE -D_POSIX_SOURCE -DSDB_MEASURE_USE_TEMP_DIR
 
 ifeq ($(OS_TARGET),Android)
 ifndef ANDROID_NDK
diff --git a/security/nss/coreconf/config.gypi b/security/nss/coreconf/config.gypi
index 7bae38ae43f0..cfd4b4cb623b 100644
--- a/security/nss/coreconf/config.gypi
+++ b/security/nss/coreconf/config.gypi
@@ -370,6 +370,7 @@
               'linux',
               '_DEFAULT_SOURCE', # for <endian.h> functions, strdup, realpath, and getentropy
               '_BSD_SOURCE', # for the above in glibc <= 2.19
+              '_SVID_SOURCE', # for putenv in glibc <= 2.19
               '_POSIX_SOURCE', # for <signal.h>
               'SDB_MEASURE_USE_TEMP_DIR', # use tmpdir for the access calls
             ],
-- 
2.38.1