mt-sde (CFLAGS_FOR_TARGET, [...]): Use +=, not =.

config/
	* mt-sde (CFLAGS_FOR_TARGET, CXXFLAGS_FOR_TARGET): Use +=, not =.
	* mt-mips-elfoabi: Likewise.

From-SVN: r130652

config/ChangeLog

+2007-12-06  Richard Sandiford  <rsandifo@nildram.co.uk>
+
+	* mt-sde (CFLAGS_FOR_TARGET, CXXFLAGS_FOR_TARGET): Use +=, not =.
+	* mt-mips-elfoabi: Likewise.
+
 2007-10-15  Maciej W. Rozycki  <macro@linux-mips.org>
 
 	* tls.m4 (GCC_CHECK_TLS): Rename have_tls to gcc_cv_have_tls.

config/mt-mips-elfoabi

@@ -2,5 +2,5 @@
 # MIPS16 and non-MIPS16 code, but the libraries are all non-MIPS16.
 # Add -minterlink-mips16 so that the libraries can be used with both
 # ISA modes.
-CFLAGS_FOR_TARGET = -minterlink-mips16
-CXXFLAGS_FOR_TARGET = -minterlink-mips16
+CFLAGS_FOR_TARGET += -minterlink-mips16
+CXXFLAGS_FOR_TARGET += -minterlink-mips16

config/mt-sde

@@ -6,5 +6,5 @@
 # has two purposes: it allows libraries to be used in situations where
 # $gp != our _gp, and it allows them to be built with -G8 while
 # retaining link compability with -G0 and -G4.
-CFLAGS_FOR_TARGET = -Os -minterlink-mips16 -mcode-xonly -mno-gpopt
-CXXFLAGS_FOR_TARGET = -Os -minterlink-mips16 -mcode-xonly -mno-gpopt
+CFLAGS_FOR_TARGET += -Os -minterlink-mips16 -mcode-xonly -mno-gpopt
+CXXFLAGS_FOR_TARGET += -Os -minterlink-mips16 -mcode-xonly -mno-gpopt