sys-libs/glibc: Drop SPARC CHOST mangling

Before "multiarch" support in glibc, picking a different CHOST would
select which optimized paths were built. Multiarch support was added in
glibc commit 3afd5a3b5556 (sparc: Add multiarch support for
memset/bzero/memcpy.) in 2010 before glibc-2.12.

Before glibc-2.30 glibc dropped support for SPARC v7 in commit
5d9b7b9fa734 (Remove 32 bit sparc v7 support) and in the process cleaned
up some configuration logic that accepted a wide variety of (now unused
CHOST values), thus causing the build to fail for us when we select a
now unknown CHOST.

Simply drop this logic, since it shouldn't be needed for any glibc since
2.11.

Signed-off-by: Matt Turner <mattst88@gentoo.org>

3 files changed, 18 insertions, 168 deletions

diff --git a/sys-libs/glibc/glibc-2.30-r6.ebuild b/sys-libs/glibc/glibc-2.30-r6.ebuild
index 5b0ea0c9dc19..a2c6434e5599 100644
--- a/sys-libs/glibc/glibc-2.30-r6.ebuild
+++ b/sys-libs/glibc/glibc-2.30-r6.ebuild
@@ -301,77 +301,27 @@ setup_target_flags() {
 			filter-flags "-fcall-used-g7"
 			append-flags "-fcall-used-g6"
 
-			# If the CHOST is the basic one (e.g. not sparcv9-xxx already),
-			# try to pick a better one so glibc can use cpu-specific .S files.
-			# We key off the CFLAGS to get a good value.  Also need to handle
-			# version skew.
-			# We can't force users to set their CHOST to their exact machine
-			# as many of these are not recognized by config.sub/gcc and such :(.
-			# Note: If the mcpu values don't scale, we might try probing CPP defines.
-			# Note: Should we factor in -Wa,-AvXXX flags too ?  Or -mvis/etc... ?
-
 			local cpu
 			case ${CTARGET} in
 			sparc64-*)
+				cpu="sparc64"
 				case $(get-flag mcpu) in
-				niagara[234])
-					if ver_test -ge 2.8 ; then
-						cpu="sparc64v2"
-					elif ver_test -ge 2.4 ; then
-						cpu="sparc64v"
-					elif ver_test -ge 2.2.3 ; then
-						cpu="sparc64b"
-					fi
-					;;
-				niagara)
-					if ver_test -ge 2.4 ; then
-						cpu="sparc64v"
-					elif ver_test -ge 2.2.3 ; then
-						cpu="sparc64b"
-					fi
-					;;
-				ultrasparc3)
-					cpu="sparc64b"
-					;;
-				*)
+				v9)
 					# We need to force at least v9a because the base build doesn't
 					# work with just v9.
 					# https://sourceware.org/bugzilla/show_bug.cgi?id=19477
-					[[ -z ${cpu} ]] && append-flags "-Wa,-xarch=v9a"
+					append-flags "-Wa,-xarch=v9a"
 					;;
 				esac
 				;;
 			sparc-*)
 				case $(get-flag mcpu) in
-				niagara[234])
-					if ver_test -ge 2.8 ; then
-						cpu="sparcv9v2"
-					elif ver_test -ge 2.4 ; then
-						cpu="sparcv9v"
-					elif ver_test -ge 2.2.3 ; then
-						cpu="sparcv9b"
-					else
-						cpu="sparcv9"
-					fi
-					;;
-				niagara)
-					if ver_test -ge 2.4 ; then
-						cpu="sparcv9v"
-					elif ver_test -ge 2.2.3 ; then
-						cpu="sparcv9b"
-					else
-						cpu="sparcv9"
-					fi
-					;;
-				ultrasparc3)
-					cpu="sparcv9b"
-					;;
-				v9|ultrasparc)
-					cpu="sparcv9"
-					;;
 				v8|supersparc|hypersparc|leon|leon3)
 					cpu="sparcv8"
 					;;
+				*)
+					cpu="sparcv9"
+					;;
 				esac
 			;;
 			esac
diff --git a/sys-libs/glibc/glibc-2.31-r2.ebuild b/sys-libs/glibc/glibc-2.31-r2.ebuild
index 15ee5c7051cb..e180533f0fc2 100644
--- a/sys-libs/glibc/glibc-2.31-r2.ebuild
+++ b/sys-libs/glibc/glibc-2.31-r2.ebuild
@@ -292,77 +292,27 @@ setup_target_flags() {
 			filter-flags "-fcall-used-g7"
 			append-flags "-fcall-used-g6"
 
-			# If the CHOST is the basic one (e.g. not sparcv9-xxx already),
-			# try to pick a better one so glibc can use cpu-specific .S files.
-			# We key off the CFLAGS to get a good value.  Also need to handle
-			# version skew.
-			# We can't force users to set their CHOST to their exact machine
-			# as many of these are not recognized by config.sub/gcc and such :(.
-			# Note: If the mcpu values don't scale, we might try probing CPP defines.
-			# Note: Should we factor in -Wa,-AvXXX flags too ?  Or -mvis/etc... ?
-
 			local cpu
 			case ${CTARGET} in
 			sparc64-*)
+				cpu="sparc64"
 				case $(get-flag mcpu) in
-				niagara[234])
-					if ver_test -ge 2.8 ; then
-						cpu="sparc64v2"
-					elif ver_test -ge 2.4 ; then
-						cpu="sparc64v"
-					elif ver_test -ge 2.2.3 ; then
-						cpu="sparc64b"
-					fi
-					;;
-				niagara)
-					if ver_test -ge 2.4 ; then
-						cpu="sparc64v"
-					elif ver_test -ge 2.2.3 ; then
-						cpu="sparc64b"
-					fi
-					;;
-				ultrasparc3)
-					cpu="sparc64b"
-					;;
-				*)
+				v9)
 					# We need to force at least v9a because the base build doesn't
 					# work with just v9.
 					# https://sourceware.org/bugzilla/show_bug.cgi?id=19477
-					[[ -z ${cpu} ]] && append-flags "-Wa,-xarch=v9a"
+					append-flags "-Wa,-xarch=v9a"
 					;;
 				esac
 				;;
 			sparc-*)
 				case $(get-flag mcpu) in
-				niagara[234])
-					if ver_test -ge 2.8 ; then
-						cpu="sparcv9v2"
-					elif ver_test -ge 2.4 ; then
-						cpu="sparcv9v"
-					elif ver_test -ge 2.2.3 ; then
-						cpu="sparcv9b"
-					else
-						cpu="sparcv9"
-					fi
-					;;
-				niagara)
-					if ver_test -ge 2.4 ; then
-						cpu="sparcv9v"
-					elif ver_test -ge 2.2.3 ; then
-						cpu="sparcv9b"
-					else
-						cpu="sparcv9"
-					fi
-					;;
-				ultrasparc3)
-					cpu="sparcv9b"
-					;;
-				v9|ultrasparc)
-					cpu="sparcv9"
-					;;
 				v8|supersparc|hypersparc|leon|leon3)
 					cpu="sparcv8"
 					;;
+				*)
+					cpu="sparcv9"
+					;;
 				esac
 			;;
 			esac
diff --git a/sys-libs/glibc/glibc-9999.ebuild b/sys-libs/glibc/glibc-9999.ebuild
index a8207576779e..1bc1d7e7ec82 100644
--- a/sys-libs/glibc/glibc-9999.ebuild
+++ b/sys-libs/glibc/glibc-9999.ebuild
@@ -291,77 +291,27 @@ setup_target_flags() {
 			filter-flags "-fcall-used-g7"
 			append-flags "-fcall-used-g6"
 
-			# If the CHOST is the basic one (e.g. not sparcv9-xxx already),
-			# try to pick a better one so glibc can use cpu-specific .S files.
-			# We key off the CFLAGS to get a good value.  Also need to handle
-			# version skew.
-			# We can't force users to set their CHOST to their exact machine
-			# as many of these are not recognized by config.sub/gcc and such :(.
-			# Note: If the mcpu values don't scale, we might try probing CPP defines.
-			# Note: Should we factor in -Wa,-AvXXX flags too ?  Or -mvis/etc... ?
-
 			local cpu
 			case ${CTARGET} in
 			sparc64-*)
+				cpu="sparc64"
 				case $(get-flag mcpu) in
-				niagara[234])
-					if ver_test -ge 2.8 ; then
-						cpu="sparc64v2"
-					elif ver_test -ge 2.4 ; then
-						cpu="sparc64v"
-					elif ver_test -ge 2.2.3 ; then
-						cpu="sparc64b"
-					fi
-					;;
-				niagara)
-					if ver_test -ge 2.4 ; then
-						cpu="sparc64v"
-					elif ver_test -ge 2.2.3 ; then
-						cpu="sparc64b"
-					fi
-					;;
-				ultrasparc3)
-					cpu="sparc64b"
-					;;
-				*)
+				v9)
 					# We need to force at least v9a because the base build doesn't
 					# work with just v9.
 					# https://sourceware.org/bugzilla/show_bug.cgi?id=19477
-					[[ -z ${cpu} ]] && append-flags "-Wa,-xarch=v9a"
+					append-flags "-Wa,-xarch=v9a"
 					;;
 				esac
 				;;
 			sparc-*)
 				case $(get-flag mcpu) in
-				niagara[234])
-					if ver_test -ge 2.8 ; then
-						cpu="sparcv9v2"
-					elif ver_test -ge 2.4 ; then
-						cpu="sparcv9v"
-					elif ver_test -ge 2.2.3 ; then
-						cpu="sparcv9b"
-					else
-						cpu="sparcv9"
-					fi
-					;;
-				niagara)
-					if ver_test -ge 2.4 ; then
-						cpu="sparcv9v"
-					elif ver_test -ge 2.2.3 ; then
-						cpu="sparcv9b"
-					else
-						cpu="sparcv9"
-					fi
-					;;
-				ultrasparc3)
-					cpu="sparcv9b"
-					;;
-				v9|ultrasparc)
-					cpu="sparcv9"
-					;;
 				v8|supersparc|hypersparc|leon|leon3)
 					cpu="sparcv8"
 					;;
+				*)
+					cpu="sparcv9"
+					;;
 				esac
 			;;
 			esac