Actually, gcc you called when you do compilation is just a driver for real compiler cc1, assembler as and linker collect2.

Use option -v in compilation, you may see something like following

Using built-in specs.
Target: i386-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk --disable-dssi --enable-plugin --with-java-home=/usr/lib/jvm/java-1.5.0-gcj- --enable-libgcj-multifile --enable-java-maintainer-mode --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --with-cpu=generic --host=i386-redhat-linux
Thread model: posix
gcc version 4.1.2 20070925 (Red Hat 4.1.2-27)
 /usr/libexec/gcc/i386-redhat-linux/4.1.2/cc1 -quiet -v test.c -quiet -dumpbase test.c -mtune=generic -auxbase test -version -o /tmp/ccDwZexX.s
ignoring nonexistent directory "/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../i386-redhat-linux/include"
#include "..." search starts here:
#include <...> search starts here:
End of search list.
GNU C version 4.1.2 20070925 (Red Hat 4.1.2-27) (i386-redhat-linux)
        compiled by GNU C version 4.1.2 20070925 (Red Hat 4.1.2-27).
GGC heuristics: --param ggc-min-expand=99 --param ggc-min-heapsize=129301
Compiler executable checksum: 53c9f9515bf7a4d930482540205071f7
 as -V -Qy -o /tmp/ccQmCBFO.o /tmp/ccDwZexX.s
GNU assembler version (i386-redhat-linux) using BFD version 20070128
 /usr/libexec/gcc/i386-redhat-linux/4.1.2/collect2 --eh-frame-hdr -m elf_i386 --hash-style=gnu -dynamic-linker /lib/ /usr/lib/gcc/i386-redhat-linux/4.1.2/../../../crt1.o /usr/lib/gcc/i386-redhat-linux/4.1.2/../../../crti.o /usr/lib/gcc/i386-redhat-linux/4.1.2/crtbegin.o -L/usr/lib/gcc/i386-redhat-linux/4.1.2 -L/usr/lib/gcc/i386-redhat-linux/4.1.2 -L/usr/lib/gcc/i386-redhat-linux/4.1.2/../../.. /tmp/ccQmCBFO.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/lib/gcc/i386-redhat-linux/4.1.2/crtend.o /usr/lib/gcc/i386-redhat-linux/4.1.2/../../../crtn.o

Do debugging with the command which runs cc1.

-- XiaomingGu - 19 Feb 2008

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Topic revision: r1 - 2008-02-19 - XiaomingGu
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