[gentoo-commits] proj/gcc-patches:master commit in: 16.0.0/gentoo/

["Sam James" <sam@gentoo.org>]

commit:     71216534d200783579348d1223aa294c93d7684b
Author:     Sam James <sam <AT> gentoo <DOT> org>
AuthorDate: Thu Oct  2 11:04:23 2025 +0000
Commit:     Sam James <sam <AT> gentoo <DOT> org>
CommitDate: Thu Oct  2 11:04:23 2025 +0000
URL:        https://gitweb.gentoo.org/proj/gcc-patches.git/commit/?id=71216534

16.0.0: drop GNU2 TLS patch until I can rebase

Signed-off-by: Sam James <sam <AT> gentoo.org>

 ...fault-to-mtls-dialect-gnu2-if-appropriate.patch | 456 ---------------------
 16.0.0/gentoo/README.history                       |   1 +
 2 files changed, 1 insertion(+), 456 deletions(-)

diff --git a/16.0.0/gentoo/86_all_PR120933-i386-default-to-mtls-dialect-gnu2-if-appropriate.patch b/16.0.0/gentoo/86_all_PR120933-i386-default-to-mtls-dialect-gnu2-if-appropriate.patch
deleted file mode 100644
index dfd673c..0000000
--- a/16.0.0/gentoo/86_all_PR120933-i386-default-to-mtls-dialect-gnu2-if-appropriate.patch
+++ /dev/null
@@ -1,456 +0,0 @@
-From 06ade1197723d083766db2ea37af464492795b07 Mon Sep 17 00:00:00 2001
-Message-ID: <06ade1197723d083766db2ea37af464492795b07.1756358799.git.sam@gentoo.org>
-From: Sam James <sam@gentoo.org>
-Date: Sun, 24 Aug 2025 00:30:45 +0100
-Subject: [PATCH] i386: default to -mtls-dialect=gnu2 if appropriate
-
-GNU2 TLS descriptors were introduced in 2006 (r0-73091-g5bf5a10b1ccacf)
-but were only opt-in with -mtls-dialect=gnu2. They are more efficient
-and it's time to enable them by default.
-
-Builds on the --with-tls= machinery from r16-3355-g96a291c4bb0b8a.
-
-We achieve this for GNU/Linux IA-32/X86-64 targets by checking if ld emits
-GLIBC_ABI_GNU2_TLS, using its presence to decide if we can default to
--mtls-dialect=gnu2.
-
-For PR ld/33130, newer ld will add GLIBC_ABI_GNU2_TLS if either unconfigured
-(auto mode) or if configured with --enable-gnu2-tls-tag. In auto mode,
-GLIBC_ABI_GNU2_TLS is only added if glibc provides it. In explicit mode, the
-user has asked for this behavior and binaries will depend on GLIBC_ABI_GNU2_TLS
-and fixed glibc. Hence the presence of GLIBC_ABI_GNU2_TLS tells us if we can
-safely default to GNU2 TLS descriptors. We added GLIBC_ABI_GNU2_TLS in glibc
-to indicate that PR dynamic-link/33129 is fixed.
-
-If distributions wish to opt-out of this for systems which meet the above
-conditions, they can either configure GCC using --with-tls=gnu, or configure
-binutils with --disable-gnu2-tls-tag: if this is necessary, it is recommended
-to use --with-tls=gnu instead, to avoid affecting the ecosystem negatively by
-having unmarked binaries.
-
-Some implementation notes:
-* The readelf check had to be moved earlier because we want
-  to set `with_tls` before `config.gcc` is processed (which has default
-  machinery for TLS).
-
-* The check doesn't really handle cross, but I don't see
-  this as a huge problem. The check is already opportunistic and if it
-  fails, it falls back to --with-tls=DIALECT if passed, and failing that,
-  the previous and safe default of 'gnu'.
-
-* The change is only made for glibc systems at this time. Enablement and testing
-  can be done for other libcs as future work.
-
-* In future, we may do the same thing for ARM if/when appropriate equivalent
-  machinery is added to glibc and bfd. This makes the separate position of
-  the check (not with some of the others) a bit more palatable IMO.
-
-gcc/ChangeLog:
-	PR target/120933
-	* configure: Regenerate.
-	* configure.ac (gcc_cv_readelf): Move check earlier.
-	(gcc_cv_libc_x86_tlsdesc_call): Define to 'yes' if
-	glibc has the GLIBC_ABI_GNU2_TLS version tag and ld emits it.
-	(with_tls): Default to 'gnu2' if --with-tls is not passed and
-	gcc_cv_libc_x86_tlsdesc_call is 'yes'.
----
- gcc/configure    | 217 +++++++++++++++++++++++++++++++----------------
- gcc/configure.ac | 112 ++++++++++++++++++------
- 2 files changed, 229 insertions(+), 100 deletions(-)
-
-diff --git a/gcc/configure b/gcc/configure
-index 4a751d969bab..ba303469613c 100755
---- a/gcc/configure
-+++ b/gcc/configure
-@@ -737,7 +737,6 @@ libgcc_visibility
- ORIGINAL_DSYMUTIL_FOR_TARGET
- gcc_cv_dsymutil
- gcc_cv_otool
--gcc_cv_readelf
- gcc_cv_objdump
- ORIGINAL_NM_FOR_TARGET
- gcc_cv_nm
-@@ -801,6 +800,7 @@ HAVE_AUTO_BUILD
- extra_opt_files
- extra_modes_file
- NATIVE_SYSTEM_HEADER_DIR
-+gcc_cv_readelf
- objext
- manext
- LIBICONV_DEP
-@@ -12927,6 +12927,145 @@ if test "x$enable_win32_utf8_manifest" != xno; then
-   host_extra_objs_mingw=utf8-mingw32.o
- fi
- 
-+
-+# Figure out what readelf we will be using.
-+if ${gcc_cv_readelf+:} false; then :
-+
-+else
-+
-+if test -f $gcc_cv_binutils_srcdir/configure.ac \
-+     && test -f ../binutils/Makefile \
-+     && test x$build = x$host; then
-+	# Single tree build which includes binutils.
-+	gcc_cv_readelf=../binutils/readelf$build_exeext
-+elif test -x readelf$build_exeext; then
-+	gcc_cv_readelf=./readelf$build_exeext
-+elif ( set dummy $READELF_FOR_TARGET; test -x $2 ); then
-+        gcc_cv_readelf="$READELF_FOR_TARGET"
-+else
-+        # Extract the first word of "$READELF_FOR_TARGET", so it can be a program name with args.
-+set dummy $READELF_FOR_TARGET; ac_word=$2
-+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-+$as_echo_n "checking for $ac_word... " >&6; }
-+if ${ac_cv_path_gcc_cv_readelf+:} false; then :
-+  $as_echo_n "(cached) " >&6
-+else
-+  case $gcc_cv_readelf in
-+  [\\/]* | ?:[\\/]*)
-+  ac_cv_path_gcc_cv_readelf="$gcc_cv_readelf" # Let the user override the test with a path.
-+  ;;
-+  *)
-+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-+for as_dir in $PATH
-+do
-+  IFS=$as_save_IFS
-+  test -z "$as_dir" && as_dir=.
-+    for ac_exec_ext in '' $ac_executable_extensions; do
-+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-+    ac_cv_path_gcc_cv_readelf="$as_dir/$ac_word$ac_exec_ext"
-+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-+    break 2
-+  fi
-+done
-+  done
-+IFS=$as_save_IFS
-+
-+  ;;
-+esac
-+fi
-+gcc_cv_readelf=$ac_cv_path_gcc_cv_readelf
-+if test -n "$gcc_cv_readelf"; then
-+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_readelf" >&5
-+$as_echo "$gcc_cv_readelf" >&6; }
-+else
-+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-+$as_echo "no" >&6; }
-+fi
-+
-+
-+fi
-+fi
-+
-+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking what readelf to use" >&5
-+$as_echo_n "checking what readelf to use... " >&6; }
-+if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
-+	# Single tree build which includes binutils.
-+	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: newly built readelf" >&5
-+$as_echo "newly built readelf" >&6; }
-+elif test x$gcc_cv_readelf = x; then
-+	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-+$as_echo "not found" >&6; }
-+else
-+	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_readelf" >&5
-+$as_echo "$gcc_cv_readelf" >&6; }
-+fi
-+
-+case $target in
-+  i[34567]86-*-gnu* | x86_64-*-gnu* )
-+	# PR target/120933
-+	# For GNU/Linux targets, check if ld emits GLIBC_ABI_GNU2_TLS.  For PR ld/33130,
-+	# newer ld will add GLIBC_ABI_GNU2_TLS if either unconfigured (auto mode) or if
-+	# configured with --enable-gnu2-tls-tag.  In auto mode, GLIBC_ABI_GNU2_TLS
-+	# is only added if glibc provides it.  In explicit mode, the user has asked
-+	# for this behavior and binaries will depend on GLIBC_ABI_GNU2_TLS and fixed
-+	# glibc.  Hence the presence of GLIBC_ABI_GNU2_TLS tells us if we can safely
-+	# default to GNU2 TLS descriptors.
-+	conftest_S='
-+		.section        .text.startup,"ax",@progbits
-+		.p2align 4
-+		.globl  main
-+		.type   main, @function
-+		main:
-+		#ifdef __x86_64__
-+			leaq    foo@TLSDESC(%rip), %rax
-+			call    *foo@TLSCALL(%rax)
-+			movl    %fs:(%rax), %eax
-+		#else
-+			leal    ld@TLSDESC(%ebx), %eax
-+			call    *ld@TLSCALL(%eax)
-+			addl    %gs:0, %eax
-+		#endif
-+			ret
-+			.size   main, .-main
-+			.section        .note.GNU-stack,"",@progbits
-+	'
-+
-+	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking libc has GLIBC_ABI_GNU2_TLS symbol dep and ld emits it" >&5
-+$as_echo_n "checking libc has GLIBC_ABI_GNU2_TLS symbol dep and ld emits it... " >&6; }
-+if ${gcc_cv_libc_x86_tlsdesc_call+:} false; then :
-+  $as_echo_n "(cached) " >&6
-+else
-+
-+		gcc_cv_libc_x86_tlsdesc_call=no
-+		echo "$conftest_S" > conftest.S
-+		if $CC $CFLAGS conftest.S -o conftest -shared > /dev/null 2>&1; then
-+			if test x$gcc_cv_readelf != x; then
-+				if $gcc_cv_readelf --version-info conftest 2>&1 \
-+					| grep "GLIBC_ABI_GNU2_TLS" > /dev/null 2>&1; then
-+					gcc_cv_libc_x86_tlsdesc_call=yes
-+				else
-+					gcc_cv_libc_x86_tlsdesc_call=no
-+				fi
-+			fi
-+		fi
-+		rm -f conftest.*
-+
-+fi
-+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_libc_x86_tlsdesc_call" >&5
-+$as_echo "$gcc_cv_libc_x86_tlsdesc_call" >&6; }
-+
-+	# Set with_tls only if it's not already set via --with-tls=DIALECT
-+	case "$gcc_cv_libc_x86_tlsdesc_call" in
-+	yes)
-+		with_tls=${with_tls:-gnu2}
-+		;;
-+	*)
-+		with_tls=${with_tls:-gnu}
-+		;;
-+	esac
-+  ;;
-+esac
-+
- # --------------------------------------------------------
- # Build, host, and target specific configuration fragments
- # --------------------------------------------------------
-@@ -21484,7 +21623,7 @@ else
-   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
-   lt_status=$lt_dlunknown
-   cat > conftest.$ac_ext <<_LT_EOF
--#line 21487 "configure"
-+#line 21626 "configure"
- #include "confdefs.h"
- 
- #if HAVE_DLFCN_H
-@@ -21590,7 +21729,7 @@ else
-   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
-   lt_status=$lt_dlunknown
-   cat > conftest.$ac_ext <<_LT_EOF
--#line 21593 "configure"
-+#line 21732 "configure"
- #include "confdefs.h"
- 
- #if HAVE_DLFCN_H
-@@ -25419,78 +25558,6 @@ else
- $as_echo "$gcc_cv_objdump" >&6; }
- fi
- 
--# Figure out what readelf we will be using.
--if ${gcc_cv_readelf+:} false; then :
--
--else
--
--if test -f $gcc_cv_binutils_srcdir/configure.ac \
--     && test -f ../binutils/Makefile \
--     && test x$build = x$host; then
--	# Single tree build which includes binutils.
--	gcc_cv_readelf=../binutils/readelf$build_exeext
--elif test -x readelf$build_exeext; then
--	gcc_cv_readelf=./readelf$build_exeext
--elif ( set dummy $READELF_FOR_TARGET; test -x $2 ); then
--        gcc_cv_readelf="$READELF_FOR_TARGET"
--else
--        # Extract the first word of "$READELF_FOR_TARGET", so it can be a program name with args.
--set dummy $READELF_FOR_TARGET; ac_word=$2
--{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
--$as_echo_n "checking for $ac_word... " >&6; }
--if ${ac_cv_path_gcc_cv_readelf+:} false; then :
--  $as_echo_n "(cached) " >&6
--else
--  case $gcc_cv_readelf in
--  [\\/]* | ?:[\\/]*)
--  ac_cv_path_gcc_cv_readelf="$gcc_cv_readelf" # Let the user override the test with a path.
--  ;;
--  *)
--  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
--for as_dir in $PATH
--do
--  IFS=$as_save_IFS
--  test -z "$as_dir" && as_dir=.
--    for ac_exec_ext in '' $ac_executable_extensions; do
--  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
--    ac_cv_path_gcc_cv_readelf="$as_dir/$ac_word$ac_exec_ext"
--    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
--    break 2
--  fi
--done
--  done
--IFS=$as_save_IFS
--
--  ;;
--esac
--fi
--gcc_cv_readelf=$ac_cv_path_gcc_cv_readelf
--if test -n "$gcc_cv_readelf"; then
--  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_readelf" >&5
--$as_echo "$gcc_cv_readelf" >&6; }
--else
--  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
--$as_echo "no" >&6; }
--fi
--
--
--fi
--fi
--
--{ $as_echo "$as_me:${as_lineno-$LINENO}: checking what readelf to use" >&5
--$as_echo_n "checking what readelf to use... " >&6; }
--if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
--	# Single tree build which includes binutils.
--	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: newly built readelf" >&5
--$as_echo "newly built readelf" >&6; }
--elif test x$gcc_cv_readelf = x; then
--	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
--$as_echo "not found" >&6; }
--else
--	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_readelf" >&5
--$as_echo "$gcc_cv_readelf" >&6; }
--fi
--
- # Figure out what otool we will be using.
- if ${gcc_cv_otool+:} false; then :
- 
-diff --git a/gcc/configure.ac b/gcc/configure.ac
-index 4532c5c22fe5..4c268d565d72 100644
---- a/gcc/configure.ac
-+++ b/gcc/configure.ac
-@@ -1886,6 +1886,93 @@ if test "x$enable_win32_utf8_manifest" != xno; then
-   host_extra_objs_mingw=utf8-mingw32.o
- fi
- 
-+
-+# Figure out what readelf we will be using.
-+AS_VAR_SET_IF(gcc_cv_readelf,, [
-+if test -f $gcc_cv_binutils_srcdir/configure.ac \
-+     && test -f ../binutils/Makefile \
-+     && test x$build = x$host; then
-+	# Single tree build which includes binutils.
-+	gcc_cv_readelf=../binutils/readelf$build_exeext
-+elif test -x readelf$build_exeext; then
-+	gcc_cv_readelf=./readelf$build_exeext
-+elif ( set dummy $READELF_FOR_TARGET; test -x $[2] ); then
-+        gcc_cv_readelf="$READELF_FOR_TARGET"
-+else
-+        AC_PATH_PROG(gcc_cv_readelf, $READELF_FOR_TARGET)
-+fi])
-+
-+AC_MSG_CHECKING(what readelf to use)
-+if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
-+	# Single tree build which includes binutils.
-+	AC_MSG_RESULT(newly built readelf)
-+elif test x$gcc_cv_readelf = x; then
-+	AC_MSG_RESULT(not found)
-+else
-+	AC_MSG_RESULT($gcc_cv_readelf)
-+fi
-+
-+case $target in
-+changequote(,)dnl
-+  i[34567]86-*-gnu* | x86_64-*-gnu* )
-+changequote([,])dnl
-+	# PR target/120933
-+	# For GNU/Linux targets, check if ld emits GLIBC_ABI_GNU2_TLS.  For PR ld/33130,
-+	# newer ld will add GLIBC_ABI_GNU2_TLS if either unconfigured (auto mode) or if
-+	# configured with --enable-gnu2-tls-tag.  In auto mode, GLIBC_ABI_GNU2_TLS
-+	# is only added if glibc provides it.  In explicit mode, the user has asked
-+	# for this behavior and binaries will depend on GLIBC_ABI_GNU2_TLS and fixed
-+	# glibc.  Hence the presence of GLIBC_ABI_GNU2_TLS tells us if we can safely
-+	# default to GNU2 TLS descriptors.
-+	conftest_S='
-+		.section        .text.startup,"ax",@progbits
-+		.p2align 4
-+		.globl  main
-+		.type   main, @function
-+		main:
-+		#ifdef __x86_64__
-+			leaq    foo@TLSDESC(%rip), %rax
-+			call    *foo@TLSCALL(%rax)
-+			movl    %fs:(%rax), %eax
-+		#else
-+			leal    ld@TLSDESC(%ebx), %eax
-+			call    *ld@TLSCALL(%eax)
-+			addl    %gs:0, %eax
-+		#endif
-+			ret
-+			.size   main, .-main
-+			.section        .note.GNU-stack,"",@progbits
-+	'
-+
-+	AC_CACHE_CHECK([libc has GLIBC_ABI_GNU2_TLS symbol dep and ld emits it],
-+		gcc_cv_libc_x86_tlsdesc_call, [
-+		gcc_cv_libc_x86_tlsdesc_call=no
-+		echo "$conftest_S" > conftest.S
-+		if $CC $CFLAGS conftest.S -o conftest -shared > /dev/null 2>&1; then
-+			if test x$gcc_cv_readelf != x; then
-+				if $gcc_cv_readelf --version-info conftest 2>&1 \
-+					| grep "GLIBC_ABI_GNU2_TLS" > /dev/null 2>&1; then
-+					gcc_cv_libc_x86_tlsdesc_call=yes
-+				else
-+					gcc_cv_libc_x86_tlsdesc_call=no
-+				fi
-+			fi
-+		fi
-+		rm -f conftest.*
-+	])
-+
-+	# Set with_tls only if it's not already set via --with-tls=DIALECT
-+	case "$gcc_cv_libc_x86_tlsdesc_call" in
-+	yes)
-+		with_tls=${with_tls:-gnu2}
-+		;;
-+	*)
-+		with_tls=${with_tls:-gnu}
-+		;;
-+	esac
-+  ;;
-+esac
-+
- # --------------------------------------------------------
- # Build, host, and target specific configuration fragments
- # --------------------------------------------------------
-@@ -2934,31 +3021,6 @@ else
- 	AC_MSG_RESULT($gcc_cv_objdump)
- fi
- 
--# Figure out what readelf we will be using.
--AS_VAR_SET_IF(gcc_cv_readelf,, [
--if test -f $gcc_cv_binutils_srcdir/configure.ac \
--     && test -f ../binutils/Makefile \
--     && test x$build = x$host; then
--	# Single tree build which includes binutils.
--	gcc_cv_readelf=../binutils/readelf$build_exeext
--elif test -x readelf$build_exeext; then
--	gcc_cv_readelf=./readelf$build_exeext
--elif ( set dummy $READELF_FOR_TARGET; test -x $[2] ); then
--        gcc_cv_readelf="$READELF_FOR_TARGET"
--else
--        AC_PATH_PROG(gcc_cv_readelf, $READELF_FOR_TARGET)
--fi])
--
--AC_MSG_CHECKING(what readelf to use)
--if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
--	# Single tree build which includes binutils.
--	AC_MSG_RESULT(newly built readelf)
--elif test x$gcc_cv_readelf = x; then
--	AC_MSG_RESULT(not found)
--else
--	AC_MSG_RESULT($gcc_cv_readelf)
--fi
--
- # Figure out what otool we will be using.
- AS_VAR_SET_IF(gcc_cv_otool,, [
- if test -x otool$build_exeext; then
--- 
-2.51.0
-

diff --git a/16.0.0/gentoo/README.history b/16.0.0/gentoo/README.history
index 55a7b59..1c3d576 100644
--- a/16.0.0/gentoo/README.history
+++ b/16.0.0/gentoo/README.history
@@ -1,5 +1,6 @@
 15	????
 
+	- 86_all_PR120933-i386-default-to-mtls-dialect-gnu2-if-appropriate.patch
 	+ 88_all_sync_toplevel-2.patch
 	+ 89_all_PR81358-autolink-libatomic.patch