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xl C/C++ compiler to GCC compiler

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xl C/C++ compiler to GCC compiler

we are converting from IBM-AIX(xl c/c++ compiler) to Linux(GCC complier).
As a part of this i need to change the CFLAGS.
The xl c/c++ complier CFLAGS is

CFLAGS := $(CDEBUG) $(PROJECT_INCLUDE_DIRS) $(COBJECT_MODE) -qcpluscmt -qmakedep -qcheck=all \
-qalign=bit_packed $(LINT_FLAGS) -D_LARGE_FILES -qchars=signed \

Please let em know the equivalent flags in GCC version.

Thanks in advance,

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GENASSYM(1)						    BSD General Commands Manual 					       GENASSYM(1)

genassym -- emit an assym.h file SYNOPSIS
genassym [-c] [-f] C compiler invocation DESCRIPTION
genassym is a shell script normally used during the kernel build process to create an assym.h file. This file defines a number of cpp con- stants derived from the configuration information genassym reads from stdin. The generated file is used by kernel sources written in assem- bler to gain access to information (e.g. structure offsets and sizes) normally only known to the C compiler. Arguments to genassym are usually of the form ${CC} ${CFLAGS} ${CPPFLAGS} where ${CC} is the C compiler used to compile the kernel, while ${CFLAGS} and ${CPPFLAGS} are flag arguments to the C compiler. The script creates a C source file from its input. Then the C compiler is called according to the script's arguments to compile this file. Normally genassym instructs the C compiler to create an assembler source from the constructed C source. The resulting file is then processed to extract the information needed to create the assym.h file. The -c flag instructs genassym to create slightly different code, generate an executable from this code and run it. In both cases the assym.h file is written to stdout. The -f flag instructs genassym to create forth code. DIAGNOSTICS
Either self-explanatory, or generated by one of the programs called from the script. SEE ALSO HISTORY
The genassym command appeared in NetBSD 1.3 as ``'' in /usr/src/sys/kern. It became a userland utility in NetBSD 4.0. BSD
April 13, 2010 BSD

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