Dear Kai Ruottu,
Very nice explanation. thank you.
What GMP and MPFR could be, you think. Are they some other components of GCC?
On Tue, Oct 19, 2010 at 1:18 PM, Kai Ruottu <kai.ruottu@xxxxxxxxxxx> wrote:
> 19.10.2010 12:05, ali hagigat kirjoitti:
>
>> gcc version 4.4.2 20091222 (Red Hat 4.4.2-20) (GCC)
>> COLLECT_GCC_OPTIONS='-o' 'my.o' '-v' '-mtune=generic' '-march=i686'
>
> The previous should come from 'gcc'...
>
>> /usr/libexec/gcc/i686-redhat-linux/4.4.2/cc1 -quiet -v my.c -quiet
>> -dumpbase my.c -mtune=generic -march=i686 -auxbase my -version -o
>> /tmp/cc6TePcE.s
>
> Just as this, showing how and from where 'cc1' was started...
>
>> ignoring nonexistent directory
>> "/usr/lib/gcc/i686-redhat-linux/4.4.2/include-fixed"
>> ignoring nonexistent directory
>>
>> "/usr/lib/gcc/i686-redhat-linux/4.4.2/../../../../i686-redhat-linux/include"
>> #include "..." search starts here:
>> #include<...> search starts here:
>> /usr/local/include
>> /usr/lib/gcc/i686-redhat-linux/4.4.2/include
>> /usr/include
>> End of search list.
>
> The preprocessor part of 'cc1' gives the previous...
>
>> GNU C (GCC) version 4.4.2 20091222 (Red Hat 4.4.2-20) (i686-redhat-linux)
>> compiled by GNU C version 4.4.2 20091222 (Red Hat 4.4.2-20), GMP
>> version 4.3.1, MPFR version 2.4.1.
>> GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
>> Compiler executable checksum: ce871bdaf8715137a79dafbeccd13c96
>> COLLECT_GCC_OPTIONS='-o' 'my.o' '-v' '-mtune=generic' '-march=i686'
>
> This then came from the C compiler part...
>
>> as -V -Qy -o /tmp/ccQBskTq.o /tmp/cc6TePcE.s
>> GNU assembler version 2.19.51.0.14 (i686-redhat-linux) using BFD
>> version version 2.19.51.0.14-34.fc12 20090722
>
> The assembler ('as') gave this...
>
>>
>> COMPILER_PATH=/usr/libexec/gcc/i686-redhat-linux/4.4.2/:/usr/libexec/gcc/i686-redhat-linux/4.4.2/:/usr/libexec/gcc/i686-redhat-linux/:/usr/lib/gcc/i686-redhat-linux/4.4.2/:/usr/lib/gcc/i686-redhat-linux/:/usr/libexec/gcc/i686-redhat-linux/4.4.2/:/usr/libexec/gcc/i686-redhat-linux/:/usr/lib/gcc/i686-redhat-linux/4.4.2/:/usr/lib/gcc/i686-redhat-linux/
>>
>> LIBRARY_PATH=/usr/lib/gcc/i686-redhat-linux/4.4.2/:/usr/lib/gcc/i686-redhat-linux/4.4.2/:/usr/lib/gcc/i686-redhat-linux/4.4.2/../../../:/lib/:/usr/lib/
>> COLLECT_GCC_OPTIONS='-o' 'my.o' '-v' '-mtune=generic' '-march=i686'
>> /usr/libexec/gcc/i686-redhat-linux/4.4.2/collect2 --eh-frame-hdr
>> --build-id -m elf_i386 --hash-style=gnu -dynamic-linker
>> /lib/ld-linux.so.2 -o my.o
>> /usr/lib/gcc/i686-redhat-linux/4.4.2/../../../crt1.o
>> /usr/lib/gcc/i686-redhat-linux/4.4.2/../../../crti.o
>> /usr/lib/gcc/i686-redhat-linux/4.4.2/crtbegin.o
>> -L/usr/lib/gcc/i686-redhat-linux/4.4.2
>> -L/usr/lib/gcc/i686-redhat-linux/4.4.2
>> -L/usr/lib/gcc/i686-redhat-linux/4.4.2/../../.. /tmp/ccQBskTq.o -lgcc
>> --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s
>> --no-as-needed /usr/lib/gcc/i686-redhat-linux/4.4.2/crtend.o
>> /usr/lib/gcc/i686-redhat-linux/4.4.2/../../../crtn.o
>
> The linker ('collect2' & 'ld') gave this...
>
> So the preprocessor and the real compiler are nowadays integrated
> into the 'cc1' executable in '$prefix/libexec/gcc/$target/$gcc_version'.
>
