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[PATCH] Default to --enable-threads=posix on Linux (was Re: libgcc_s, Linux, and PT_GNU_EH_FRAME, and binutils)

From: Jakub Jelinek <jakub at redhat dot com>
To: Mark Mitchell <mark at codesourcery dot com>
Cc: "Martin v. Loewis" <martin at v dot loewis dot de>, Richard Henderson <rth at twiddle dot net>, "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>
Date: Tue, 6 Aug 2002 11:31:55 +0200
Subject: [PATCH] Default to --enable-threads=posix on Linux (was Re: libgcc_s, Linux, and PT_GNU_EH_FRAME, and binutils)
References: <m3r8hdvw99.fsf@mira.informatik.hu-berlin.de> <4220000.1028584720@warlock.codesourcery.com>
Reply-to: Jakub Jelinek <jakub at redhat dot com>

On Mon, Aug 05, 2002 at 02:58:40PM -0700, Mark Mitchell wrote:
> Do it quickly, send me a patch, and we can obviate the debate by having
> the change in.  I just can't see holding up the release for that.

Here is the proposed minimum patch to default to --enable-threads=posix
unless either some other --enable-threads option or --disable-threads
is given on Linux. I don't see why somebody might want not to build thread
aware gcc/libstdc++ by default.

I've verified that configure with --disable-threads gives the configuration
which used to be, ie. no thread support and that no --*threads option given
to configure causes posix threads to be used.

Ok to commit to mainline/3.2 branch?

2002-08-06  Jakub Jelinek  <jakub@redhat.com>

	* config.gcc (alpha*-*-linux*, hppa*-*-linux*, i[34567]86-*-linux*,
	x86_64-*-linux*, ia64*-*-linux*, m68k-*-linux*, mips*-*-linux*,
	powerpc-*-linux-gnualtivec*, powerpc-*-linux*, s390-*-linux*,
	s390x-*-linux*, sh-*-linux*, sparc-*-linux*, sparc64-*-linux*): Default
	to --enable-threads=posix if no --{enable,disable}-threads is given
	to configure.

--- gcc/config.gcc.jj	2002-06-10 23:25:16.000000000 +0200
+++ gcc/config.gcc	2002-08-06 11:35:53.000000000 +0200
@@ -558,9 +558,10 @@ alpha*-*-linux*)
 	tmake_file="t-slibgcc-elf-ver t-linux alpha/t-crtfm alpha/t-alpha alpha/t-ieee"
 	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o"
 	gas=yes gnu_ld=yes
-	if test x$enable_threads = xyes; then
-		thread_file='posix'
-	fi
+	case x${enable_threads} in
+		x | xyes) thread_file='posix'
+		;;
+	esac
 	;;
 alpha*-*-freebsd*)
 	tm_file="${tm_file} ${fbsd_tm_file} alpha/elf.h alpha/freebsd.h"
@@ -871,9 +872,10 @@ hppa*-*-linux* | parisc*-*-linux*)
 	tmake_file="t-slibgcc-elf-ver t-linux pa/t-linux"
 	extra_parts="crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o"
 	gas=yes gnu_ld=yes
-	if test x$enable_threads = xyes; then
-		thread_file='posix'
-	fi
+	case x${enable_threads} in
+		x | xyes) thread_file='posix'
+		;;
+	esac
 	;;
 hppa*-*-openbsd*)
 	target_cpu_default="MASK_PA_11"
@@ -1316,9 +1318,10 @@ i[34567]86-*-linux*)	# Intel 80386's run
 	extra_parts="crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o"
 	gnu_ld=yes
 	float_format=i386
-	if test x$enable_threads = xyes; then
-		thread_file='posix'
-	fi
+	case x${enable_threads} in
+		x | xyes) thread_file='posix'
+		;;
+	esac
 	;;
 x86_64-*-linux*)
 	tm_file="${tm_file} i386/att.h dbxelf.h elfos.h svr4.h linux.h \
@@ -1327,9 +1330,10 @@ x86_64-*-linux*)
 	extra_parts="crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o"
 	gnu_ld=yes
 	float_format=i386
-	if test x$enable_threads = xyes; then
-		thread_file='posix'
-	fi
+	case x${enable_threads} in
+		x | xyes) thread_file='posix'
+		;;
+	esac
 	;;
 i[34567]86-*-gnu*)
 	float_format=i386
@@ -1705,9 +1709,10 @@ ia64*-*-linux*)
 	tm_file="${tm_file} dbxelf.h elfos.h svr4.h linux.h ia64/sysv4.h ia64/linux.h"
 	tmake_file="t-slibgcc-elf-ver t-linux ia64/t-ia64 ia64/t-glibc"
 	target_cpu_default="MASK_GNU_AS|MASK_GNU_LD"
-	if test x$enable_threads = xyes; then
-		thread_file='posix'
-	fi
+	case x${enable_threads} in
+		x | xyes) thread_file='posix'
+		;;
+	esac
 	float_format=i386
 	;;
 ia64*-*-hpux*)
@@ -2098,9 +2103,10 @@ m68k-*-linux*)		# Motorola m68k's runnin
 	extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"
 	float_format=m68k
 	gnu_ld=yes
-	if test x$enable_threads = xyes; then
-		thread_file='posix'
-	fi
+	case x${enable_threads} in
+		x | xyes) thread_file='posix'
+		;;
+	esac
 	;;
 m68k-*-psos*)
 	tmake_file=m68k/t-m68kbare
@@ -2397,9 +2403,10 @@ mips*-*-linux*)				# Linux MIPS, either 
 	extra_parts="crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o"
 	gnu_ld=yes
 	gas=yes
-	if test x$enable_threads = xyes; then
-		thread_file='posix'
-	fi
+	case x${enable_threads} in
+		x | xyes) thread_file='posix'
+		;;
+	esac
 	;;
 mips*el-*-openbsd*)	# mips little endian
 	target_cpu_default="MASK_GAS|MASK_ABICALLS"
@@ -2867,17 +2874,19 @@ powerpc-*-linux-gnualtivec*)
 	tm_file="${tm_file} dbxelf.h elfos.h svr4.h freebsd-spec.h rs6000/sysv4.h rs6000/linux.h rs6000/linuxaltivec.h"
 	out_file=rs6000/rs6000.c
 	tmake_file="rs6000/t-ppcos t-slibgcc-elf-ver t-linux rs6000/t-ppccomm"
-	if test x$enable_threads = xyes; then
-		thread_file='posix'
-	fi
+	case x${enable_threads} in
+		x | xyes) thread_file='posix'
+		;;
+	esac
 	;;
 powerpc-*-linux*)
 	tm_file="${tm_file} dbxelf.h elfos.h svr4.h freebsd-spec.h rs6000/sysv4.h rs6000/linux.h"
 	out_file=rs6000/rs6000.c
 	tmake_file="rs6000/t-ppcos t-slibgcc-elf-ver t-linux rs6000/t-ppccomm"
-	if test x$enable_threads = xyes; then
-		thread_file='posix'
-	fi
+	case x${enable_threads} in
+		x | xyes) thread_file='posix'
+		;;
+	esac
 	;;
 powerpc-*-gnu-gnualtivec*)
 	tm_file="${cpu_type}/${cpu_type}.h elfos.h svr4.h freebsd-spec.h gnu.h rs6000/sysv4.h rs6000/linux.h rs6000/linuxaltivec.h rs6000/gnu.h"
@@ -2993,9 +3002,10 @@ s390-*-linux*)
 	tm_file="s390/s390.h dbxelf.h elfos.h svr4.h linux.h s390/linux.h"
 	tmake_file="t-slibgcc-elf-ver t-linux s390/t-linux"
 	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o"
-	if test x$enable_threads = xyes; then
-		thread_file='posix'
-	fi
+	case x${enable_threads} in
+		x | xyes) thread_file='posix'
+		;;
+	esac
 	;;
 s390x-*-linux*)
 	tm_file="s390/s390x.h s390/s390.h dbxelf.h elfos.h svr4.h linux.h s390/linux.h"
@@ -3004,9 +3014,10 @@ s390x-*-linux*)
 	out_file=s390/s390.c
 	tmake_file="t-slibgcc-elf-ver t-linux s390/t-linux s390/t-linux64"
 	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o"
-	if test x$enable_threads = xyes; then
-		thread_file='posix'
-	fi
+	case x${enable_threads} in
+		x | xyes) thread_file='posix'
+		;;
+	esac
 	;;
 sh-*-elf*)
 	tmake_file="sh/t-sh sh/t-elf"
@@ -3045,9 +3056,10 @@ sh-*-linux*)
 	tm_file="${tm_file} sh/elf.h sh/linux.h"
 	tmake_file="sh/t-sh sh/t-elf sh/t-linux"
 	gas=yes gnu_ld=yes
-	if test x$enable_threads = xyes; then
-		thread_file='posix'
-	fi
+	case x${enable_threads} in
+		x | xyes) thread_file='posix'
+		;;
+	esac
 	float_format=sh
 	;;
 sh-*-*)
@@ -3131,9 +3143,10 @@ sparc-*-linux*)		# Sparc's running GNU/L
 	tmake_file="t-slibgcc-elf-ver t-linux sparc/t-crtfm"
 	extra_parts="crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o"
 	gnu_ld=yes
-	if test x$enable_threads = xyes; then
-		thread_file='posix'
-	fi
+	case x${enable_threads} in
+		x | xyes) thread_file='posix'
+		;;
+	esac
 	float_format=sparc
 	;;
 sparc-*-lynxos*)
@@ -3332,9 +3345,10 @@ sparc64-*-linux*)		# 64-bit Sparc's runn
 	tm_file="sparc/biarch64.h ${tm_file} dbxelf.h elfos.h svr4.h sparc/sysv4.h sparc/linux64.h"
 	extra_parts="crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o"
 	gnu_ld=yes
-	if test x$enable_threads = xyes; then
-		thread_file='posix'
-	fi
+	case x${enable_threads} in
+		x | xyes) thread_file='posix'
+		;;
+	esac
 	float_format=sparc
 	;;
 sparc64-*-netbsd*)


	Jakub

Follow-Ups:
- Re: [PATCH] Default to --enable-threads=posix on Linux (was Re: libgcc_s, Linux, and PT_GNU_EH_FRAME, and binutils)
  - From: Christoph Hellwig
- Re: [PATCH] Default to --enable-threads=posix on Linux (was Re: libgcc_s, Linux, and PT_GNU_EH_FRAME, and binutils)
  - From: Franz Sirl
- Re: [PATCH] Default to --enable-threads=posix on Linux (was Re:libgcc_s, Linux, and PT_GNU_EH_FRAME, and binutils)
  - From: Mark Mitchell

References:
- Re: libgcc_s, Linux, and PT_GNU_EH_FRAME, and binutils
  - From: Martin v. Loewis
- Re: libgcc_s, Linux, and PT_GNU_EH_FRAME, and binutils
  - From: Mark Mitchell

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