From kbrown@cornell.edu

When testing whether to use -D_FORTIFY_SOURCE, the Configure script only
looks for GCC 4 or 5 and otherwise reports "You seem not to have gcc 4.*
or later, not adding -D_FORTIFY_SOURCE." The trivial fix is attached.

Ken

Flags​:
  category=core
  severity=low

Site configuration information for perl 5.26.0​:

Configured by kbrown at Wed Jul 19 09​:30​:20 EDT 2017.

Summary of my perl5 (revision 5 version 26 subversion 0) configuration​:

  Platform​:
  osname=cygwin
  osvers=2.8.3(0.31353)
  archname=x86_64-cygwin-threads-multi
  uname='cygwin_nt-10.0 desktop-new 2.8.3(0.31353) x86_64 cygwin '
  config_args='-des -Dprefix=/usr -Dmksymlinks
-Darchname=x86_64-cygwin-threads -Dlibperl=cygperl5_26.dll -Dcc=gcc
-Dld=g++ -Accflags=-ggdb -O2 -pipe -Wimplicit-function-declaration
-fdebug-prefix-map=/home/kbrown/src/cygperl/perl-5.26.0-2.x86_64/build=/usr/src/debug/perl-5.26.0-2
-fdebug-prefix-map=/home/kbrown/src/cygperl/perl-5.26.0-2.x86_64/src/perl-5.26.0=/usr/src/debug/perl-5.26.0-2
-fwrapv'
  hint=recommended
  useposix=true
  d_sigaction=define
  useithreads=define
  usemultiplicity=define
  use64bitint=define
  use64bitall=define
  uselongdouble=undef
  usemymalloc=n
  default_inc_excludes_dot=define
  bincompat5005=undef
  Compiler​:
  cc='gcc'
  ccflags ='-DPERL_USE_SAFE_PUTENV -D_GNU_SOURCE -U__STRICT_ANSI__
-ggdb -O2 -pipe -Wimplicit-function-declaration
-fdebug-prefix-map=/home/kbrown/src/cygperl/perl-5.26.0-2.x86_64/build=/usr/src/debug/perl-5.26.0-2
-fdebug-prefix-map=/home/kbrown/src/cygperl/perl-5.26.0-2.x86_64/src/perl-5.26.0=/usr/src/debug/perl-5.26.0-2
-fwrapv -fno-strict-aliasing -fstack-protector-strong -D_FORTIFY_SOURCE=2'
  optimize='-O3'
  cppflags='-DPERL_USE_SAFE_PUTENV -D_GNU_SOURCE -U__STRICT_ANSI__
-ggdb -O2 -pipe -Wimplicit-function-declaration
-fdebug-prefix-map=/home/kbrown/src/cygperl/perl-5.26.0-2.x86_64/build=/usr/src/debug/perl-5.26.0-2
-fdebug-prefix-map=/home/kbrown/src/cygperl/perl-5.26.0-2.x86_64/src/perl-5.26.0=/usr/src/debug/perl-5.26.0-2
-fwrapv -fno-strict-aliasing -fstack-protector-strong'
  ccversion=''
  gccversion='5.4.0'
  gccosandvers=''
  intsize=4
  longsize=8
  ptrsize=8
  doublesize=8
  byteorder=12345678
  doublekind=3
  d_longlong=define
  longlongsize=8
  d_longdbl=define
  longdblsize=16
  longdblkind=3
  ivtype='long'
  ivsize=8
  nvtype='double'
  nvsize=8
  Off_t='off_t'
  lseeksize=8
  alignbytes=8
  prototype=define
  Linker and Libraries​:
  ld='g++'
  ldflags =' -Wl,--enable-auto-import -Wl,--export-all-symbols
-Wl,--enable-auto-image-base -fstack-protector-strong'
  libpth=/usr/lib
  libs=-lpthread -lgdbm -ldb -ldl -lcrypt -lgdbm_compat
  perllibs=-lpthread -ldl -lcrypt
  libc=/usr/lib/libcygwin.a
  so=dll
  useshrplib=true
  libperl=cygperl5_26.dll
  gnulibc_version=''
  Dynamic Linking​:
  dlsrc=dl_dlopen.xs
  dlext=dll
  d_dlsymun=undef
  ccdlflags=' '
  cccdlflags=' '
  lddlflags=' --shared -Wl,--enable-auto-import
-Wl,--export-all-symbols -Wl,--enable-auto-image-base
-fstack-protector-strong'

@​INC for perl 5.26.0​:
  /usr/lib/perl5/site_perl/5.26/x86_64-cygwin-threads
  /usr/lib/perl5/site_perl/5.26
  /usr/lib/perl5/vendor_perl/5.26/x86_64-cygwin-threads
  /usr/lib/perl5/vendor_perl/5.26
  /usr/lib/perl5/5.26/x86_64-cygwin-threads
  /usr/lib/perl5/5.26

Environment for perl 5.26.0​:
  HOME=/home/kbrown
  LANG=en_US.UTF-8
  LANGUAGE (unset)
  LD_LIBRARY_PATH (unset)
  LOGDIR (unset)

PATH=/home/kbrown/bin​:/usr/local/bin​:/usr/bin​:/c/ProgramData/Oracle/Java/javapath​:/c/Program
Files/Common Files/Microsoft Shared/Windows Live​:/c/Program Files
(x86)/Common Files/Microsoft Shared/Windows Live​:/c/Program Files
(x86)/Intel/iCLS Client​:/c/Program Files/Intel/iCLS Client​:/c/Program
Files (x86)/AMD APP/bin/x86_64​:/c/Program Files (x86)/AMD
APP/bin/x86​:/c/WINDOWS/system32​:/c/WINDOWS​:/c/WINDOWS/System32/Wbem​:/c/WINDOWS/System32/WindowsPowerShell/v1.0​:/c/Program
Files (x86)/ATI Technologies/ATI.ACE/Core-Static​:/c/Program Files
(x86)/Windows Live/Shared​:/c/Program Files (x86)/Common
Files/Intuit/QBPOSSDKRuntime​:/c/Program Files (x86)/ATI
Technologies/ATI.ACE/Core-Static​:/c/Users/kbrown/AppData/Local/Microsoft/WindowsApps​:/usr/lib/lapack
  PERL_BADLANG (unset)
  SHELL=/bin/bash

From kbrown@cornell.edu

From 49534dc34fa62de65a1adc6ef89ba7e5cc323052 Mon Sep 17 00:00:00 2001
From: Ken Brown <kbrown@cornell.edu>
Date: Thu, 27 Jul 2017 11:57:44 -0400
Subject: [PATCH] Configure: check for GCC 6 and 7

---
 Configure | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Configure b/Configure
index 3259249500..bdcfaf17ef 100755
--- a/Configure
+++ b/Configure
@@ -23612,7 +23612,7 @@ fi
 
 : add -D_FORTIFY_SOURCE if feasible and not already there
 case "$gccversion" in
-[45].*)	case "$optimize$ccflags" in
+[4567].*)	case "$optimize$ccflags" in
 	*-O*)	case "$ccflags$cppsymbols" in
 		*_FORTIFY_SOURCE=*) # Don't add it again.
 			echo "You seem to have -D_FORTIFY_SOURCE already, not adding it." >&4
-- 
2.13.2

From @tonycoz

On Thu, 27 Jul 2017 09​:24​:44 -0700, kbrown@​cornell.edu wrote​:

When testing whether to use -D_FORTIFY_SOURCE, the Configure script
only
looks for GCC 4 or 5 and otherwise reports "You seem not to have gcc
4.*
or later, not adding -D_FORTIFY_SOURCE." The trivial fix is attached.

Thanks, applied as b948647.

Tony

The RT System itself - Status changed from 'new' to 'open'

@tonycoz - Status changed from 'open' to 'pending release'

From @khwilliamson

Thank you for filing this report. You have helped make Perl better.

With the release yesterday of Perl 5.28.0, this and 185 other issues have been
resolved.

Perl 5.28.0 may be downloaded via​:
https://metacpan.org/release/XSAWYERX/perl-5.28.0

If you find that the problem persists, feel free to reopen this ticket.

@khwilliamson - Status changed from 'pending release' to 'resolved'