[newlib-cygwin] newlib: drop i?86-pc-linux-* target support

[newlib-cygwin] newlib: drop i?86-pc-linux-* target support

[Michael Frysinger]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=462d6942f6be6addbf0a977af366b421810738bb

commit 462d6942f6be6addbf0a977af366b421810738bb
Author: Mike Frysinger <vapier@gentoo.org>
Date:   Mon Feb 7 04:57:29 2022 -0500

    newlib: drop i?86-pc-linux-* target support
    
    This was added 20+ years ago.  It seems to have very few (or no users)
    as it only works on 32-bit x86 GNU/Linux (i.e. glibc) systems, and even
    then only with old versions of glibc.  It hasn't compiled in at least 5
    years, but most likely been broken for more like 15 years -- it relies
    on internal glibc APIs (like linuxthreads), and that code has changed
    and been deleted significantly since.
    
    This single target ends up dragging in a lot of non-trivial code that is
    hard to keep working, and currently impossible to verify -- the libtool
    and iconvdata and sys/linux/ code isn't used by anything else, but ends
    up touching just about every build file in the tree.  Punt the target so
    we can start stripping out all these unique code paths.
    
    This commit by itself just disables the target.  We'll start deleting the
    individual unused pieces in followups.

Diff:
---
 newlib/NEWS           |  4 ++++
 newlib/README         | 34 ----------------------------------
 newlib/configure      |  5 -----
 newlib/configure.ac   |  5 -----
 newlib/configure.host | 40 +---------------------------------------
 5 files changed, 5 insertions(+), 83 deletions(-)

diff --git a/newlib/NEWS b/newlib/NEWS
index fdca12ab9..d007aac3d 100644
--- a/newlib/NEWS
+++ b/newlib/NEWS
@@ -1,3 +1,7 @@
+*** Major changes in newlib version 4.3.0:
+
+- remove i?86-pc-linux-gnu support
+
 *** Major changes in newlib version 4.2.0:
 
 - remove use of --cygnus option for automake
diff --git a/newlib/README b/newlib/README
index c025cb38d..aa48b246f 100644
--- a/newlib/README
+++ b/newlib/README
@@ -508,40 +508,6 @@ need to add the other targets you're testing to the case statement.
 Now type make check-target-newlib in the top-level build directory to
 run the testsuite.
 
-Shared newlib
-=============
-
-newlib uses libtool when it is being compiled natively (with
---target=i[34567]86-pc-linux-gnu) on an i[34567]86-pc-linux-gnu
-host. This allows newlib to be compiled as a shared library.
-
-To configure newlib, do the following from your build directory:
-
-$(source_dir)/src/configure --with-newlib --prefix=$(install_dir)
-
-configure will recognize that host == target ==
-i[34567]86-pc-linux-gnu, so it will tell newlib to compile itself using
-libtool. By default, libtool will build shared and static versions of
-newlib.
-
-To compile a program against shared newlib, do the following (where
-target_install_dir = $(install_dir)/i[34567]86-pc-linux-gnu):
-
-gcc -nostdlib $(target_install_dir)/lib/crt0.o progname.c -I $(target_install_dir)/include -L $(target_install_dir)/lib -lc -lm -lgcc
-
-To run the program, make sure that $(target_install_dir)/lib is listed
-in the LD_LIBRARY_PATH environment variable.
-
-To create a static binary linked against newlib, do the following:
-
-gcc -nostdlib -static $(target_install_dir)/lib/crt0.o progname.c -I $(target_install_dir)/include -L $(target_install_dir)/lib -lc -lm
-
-libtool can be instructed to produce only static libraries. To build
-newlib as a static library only, do the following from your build
-directory:
-
-$(source_dir)/src/configure --with-newlib --prefix=$(install_dir) --disable-shared
-
 Regenerating Configuration Files
 ================================
 
diff --git a/newlib/configure b/newlib/configure
index a80cf0194..7b2a45868 100755
--- a/newlib/configure
+++ b/newlib/configure
@@ -12076,11 +12076,6 @@ fi
 
 
 HAVE_ICONVDATA=false
-case $host in
-  i[34567]86-pc-linux-*)
-	HAVE_ICONVDATA=true
-	;;
-esac
  if $HAVE_ICONVDATA; then
   HAVE_ICONVDATA_TRUE=
   HAVE_ICONVDATA_FALSE='#'
diff --git a/newlib/configure.ac b/newlib/configure.ac
index 2e6a80a5f..366fffafc 100644
--- a/newlib/configure.ac
+++ b/newlib/configure.ac
@@ -348,11 +348,6 @@ AM_CONDITIONAL(HAVE_DOC, test x$have_multisubdir = xno)
 AM_CONDITIONAL(HAVE_MULTISUBDIR, test x$have_multisubdir = xyes)
 
 HAVE_ICONVDATA=false
-case $host in
-  i[[34567]]86-pc-linux-*)
-	HAVE_ICONVDATA=true
-	;;
-esac
 AM_CONDITIONAL([HAVE_ICONVDATA], $HAVE_ICONVDATA)
 
 CRT0=
diff --git a/newlib/configure.host b/newlib/configure.host
index 893a698ed..4eae14063 100644
--- a/newlib/configure.host
+++ b/newlib/configure.host
@@ -406,7 +406,7 @@ fi
 
 if [ "x${newlib_mb}" = "x" ]; then
 	case "${host}" in
-  	  i[34567]86-pc-linux-*|*-*-cygwin*)
+	  *-*-cygwin*)
 		newlib_mb=yes
 	  	;;
 	esac
@@ -418,21 +418,6 @@ if [ "${newlib_io_float}" = "no" ] ; then
 	newlib_cflags="${newlib_cflags} -DNO_FLOATING_POINT"
 fi
 
-# Verify if shared newlib support is allowed and set appropriate variables
-# We don't want to use libtool for platforms that we are not going to
-# support shared libraries.  This is because it adds executable tests which
-# we don't want for most embedded platforms.
-case "${host}" in
-  i[34567]86-pc-linux-*)
-    use_libtool=yes
-    have_sys_mach_dir=yes
-    stdio64_dir=stdio64
-    oext=lo
-    lpfx=
-    aext=la ;;
-  *) ;; #shared library not supported for ${host}
-esac
-
 # Get the source directories to use for the host.  unix_dir is set
 # to unix to get some standard Unix routines.  posix_dir is set to get some
 # standard Posix routines.  sys_dir should supply system dependent routines
@@ -530,29 +515,6 @@ case "${host}" in
 	sys_dir=sysvi386
 	unix_dir=unix
 	;;
-  i[34567]86-pc-linux-*)
-	sys_dir=linux
-	unix_dir=unix
-	posix_dir=posix
-	crt1=crt1.o
-	crt1_dir=libc/sys/${sys_dir}	
-	gcc_dir=`gcc -print-search-dirs | awk '/^install:/{print $2}'`
-	default_newlib_io_c99_formats="yes"
-	default_newlib_io_long_double="yes"
-	default_newlib_io_long_long="yes"
-	default_newlib_io_pos_args="yes"
-	#newlib_cflags="${newlib_cflags} -Werror" # DEBUGGING ONLY;BREAKS BUILD
-	newlib_cflags="${newlib_cflags} -Wall"
-	newlib_cflags="${newlib_cflags} -DHAVE_FCNTL"
-	newlib_cflags="${newlib_cflags} -DHAVE_GETOPT"
-	newlib_cflags="${newlib_cflags} -D_NO_POSIX_SPAWN"
-	# --- Required when building a shared library ------------------------
-	newlib_cflags="${newlib_cflags} -fPIC -D_I386MACH_NEED_SOTYPE_FUNCTION"
-	# --- The three lines below are optional ------------------------------
-	##newlib_cflags="${newlib_cflags} -nostdinc"
-	##newlib_cflags="${newlib_cflags} -I`newlib-flags --kernel-dir`/include"
-	##newlib_cflags="${newlib_cflags} -idirafter ${gcc_dir}include"
-	;;
 
   m68hc11-*-*|m6811-*-*|m6812-*-*|m68hc12-*-*)
 	;;