make/autoconf/spec.gmk.in

@  rev 51624 : 8210416: [linux] Poor StrictMath performance due to non-optimized compilation
|  Summary: Compile fdlibm with -O2 -ffp-contract=off on gcc/clang arches.
~  Reviewed-by: aph, erikj, dholmes, darcy

*** 448,457 ****
--- 448,458 ----
  CXXFLAGS_JDKEXE:=@CXXFLAGS_JDKEXE@
  
  LIBJSIG_HASHSTYLE_LDFLAGS := @LIBJSIG_HASHSTYLE_LDFLAGS@
  LIBJSIG_NOEXECSTACK_LDFLAGS := @LIBJSIG_NOEXECSTACK_LDFLAGS@
  
+ FDLIBM_CFLAGS := @FDLIBM_CFLAGS@
  JVM_CFLAGS := @JVM_CFLAGS@
  JVM_LDFLAGS := @JVM_LDFLAGS@
  JVM_ASFLAGS := @JVM_ASFLAGS@
  JVM_LIBS := @JVM_LIBS@
  JVM_RCFLAGS := @JVM_RCFLAGS@