xlc@AIX problems building egcs-19980517. configure questions.

[Yotam Medini]

Building egcs-19980517 on AIX using the native compiler
    Configuring for a rs6000-ibm-aix4.1.4.0 host.

I get:

xlc -c  -DIN_GCC    -g  -DHAVE_CONFIG_H -DHAIFA    -I. -I/home/seg/yotam/build/egcs/egcs-19980517/gcc -I/home/seg/yotam/build/egcs/egcs-19980517/gcc/config /home/seg/yotam/build/egcs/egcs-19980517/gcc/gengenrtl.c
"/home/seg/yotam/build/egcs/egcs-19980517/gcc/gengenrtl.c", line 60.1: 1506-343 (S) Redeclaration of type_from_format differs from previous declaration on line 47 of "/home/seg/yotam/build/egcs/egcs-19980517/gcc/gengenrtl.c".
"/home/seg/yotam/build/egcs/egcs-19980517/gcc/gengenrtl.c", line 60.1: 1506-379 (I) Prototype for function type_from_format must contain only promoted types if prototype and nonprototype declarations are mixed.
"/home/seg/yotam/build/egcs/egcs-19980517/gcc/gengenrtl.c", line 60.1: 1506-380 (I) Parameter 1 has type "char" which promotes to "int".
"/home/seg/yotam/build/egcs/egcs-19980517/gcc/gengenrtl.c", line 92.1: 1506-343 (S) Redeclaration of accessor_from_format differs from previous declaration on line 48 of "/home/seg/yotam/build/egcs/egcs-19980517/gcc/gengenrtl.c".
"/home/seg/yotam/build/egcs/egcs-19980517/gcc/gengenrtl.c", line 92.1: 1506-379 (I) Prototype for function accessor_from_format must contain only promoted types if prototype and nonprototype declarations are mixed.
"/home/seg/yotam/build/egcs/egcs-19980517/gcc/gengenrtl.c", line 92.1: 1506-380 (I) Parameter 1 has type "char" which promotes to "int".
make[3]: *** [gengenrtl.o] Error 1


Questions:
*  How do I specify in top level configure CFLAGS that will be written
   into Makefile-s in subdirectories
  
* gcc/Makefile has

 # XCFLAGS is used for most compilations but not when using the GCC just built.
 # TCFLAGS is used for compilations with the GCC just built.

  Are these configure-able thru the top configure?

-- yotam