install.texi (--with-mips-plt): Document.

gcc/
2008-08-17  Daniel Jacobowitz  <dan@codesourcery.com>
	    Richard Sandiford  <rdsandiford@googlemail.com>

	* doc/install.texi (--with-mips-plt): Document.
	* doc/invoke.texi (-mplt, -mno-plt): Document.
	* config.gcc (mips*-*-*): Add mips-plt to supported_defaults
	and handle ${with_mips_plt}.
	* config/mips/mips.opt (mplt): New option.
	* config/mips/mips.h (TARGET_ABICALLS_PIC0): New macro.
	(TARGET_ABICALLS_PIC2): Likewise.
	(TARGET_GPWORD): Return false for TARGET_ABSOLUTE_ABICALLS.
	(OPTION_DEFAULT_SPECS): Add a mips-plt entry.
	(ASM_SPEC): Use !mabi=* instead of !mabi*.
	(MIPS_CALL): Use TARGET_ABICALLS_PIC2 instead of TARGET_ABICALLS
	to decide whether to output ".option picX" directives.
	* config/mips/linux.h (SUBTARGET_ASM_SPEC): Remove -mabi=64 handling.
	Pass -call_nonpic rather than -KPIC for -mplt.
	(BASE_DRIVER_SELF_SPECS): Remove -mplt if -mno-shared is not present
	on the command line.  Also remove it when -mabi=64 is used without
	-msym32.
	* config/mips/linux64.h (SUBTARGET_ASM_SPEC): Delete.
	* config/mips/mips.c (mips_use_pic_fn_addr_reg_p): Handle
	TARGET_ABICALLS_PIC0.
	(mips_classify_symbol): Use TARGET_ABICALLS_PIC2 instead of
	TARGET_ABICALLS.
	(mips16_build_function_stub): Only output ".option pic" directives
	and PIC stubs if TARGET_ABICALLS_PIC2.  Call through $25 instead of $1.
	(mips16_build_call_stub): Fix comment and remove redundant
	".set at"/"set .noat" directives.
	(mips_function_rodata_section): Use the default behaviour for
	TARGET_ABSOLUTE_ABICALLS.
	(mips_file_start): Emit ".option pic0" for TARGET_ABICALLS_PIC0.
	(mips_global_pointer): Handle TARGET_ABICALLS_PIC0.
	(mips_restore_gp): Do nothing if the current function doesn't use
	a global pointer.
	(mips_expand_prologue): Only save $gp if the current function uses it.
	Use a normal move for TARGET_ABICALLS_PIC0.
	(mips_override_options): Only set flag_pic if TARGET_ABICALLS_PIC2.

Co-Authored-By: Richard Sandiford <rdsandiford@googlemail.com>

From-SVN: r139170

1 files changed, 18 insertions, 3 deletions

diff --git a/gcc/config.gcc b/gcc/config.gcc
index 30339e2..7078b0b 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -2779,7 +2779,7 @@ case "${target}" in
 		;;
 
 	mips*-*-*)
-		supported_defaults="abi arch float tune divide llsc"
+		supported_defaults="abi arch float tune divide llsc mips-plt"
 
 		case ${with_float} in
 		"" | soft | hard)
@@ -2826,6 +2826,21 @@ case "${target}" in
 			exit 1
 			;;
 		esac
+
+		case ${with_mips_plt} in
+		yes)
+			with_mips_plt=plt
+			;;
+		no)
+			with_mips_plt=no-plt
+			;;
+		"")
+			;;
+		*)
+			echo "Unknown --with-mips-plt argument: $with_mips_plt" 1>&2
+			exit 1
+			;;
+		esac
 		;;
 
 	powerpc*-*-* | rs6000-*-*)
@@ -3078,10 +3093,10 @@ case ${target} in
 esac
 
 t=
-all_defaults="abi cpu cpu_32 cpu_64 arch arch_32 arch_64 tune tune_32 tune_64 schedule float mode fpu divide llsc"
+all_defaults="abi cpu cpu_32 cpu_64 arch arch_32 arch_64 tune tune_32 tune_64 schedule float mode fpu divide llsc mips-plt"
 for option in $all_defaults
 do
-	eval "val=\$with_$option"
+	eval "val=\$with_"`echo $option | sed s/-/_/g`
 	if test -n "$val"; then
 		case " $supported_defaults " in
 		*" $option "*)