how customise specs?

[lazer1 <lazer1 at blueyonder dot co dot uk>]

Hi,


how do I customise a specs file,

I have attached the specs file I am looking at for
my m68k-unknown-amigaos-x-i686-pc-aros gcc attempt,

I wish to disconnect -lgcc, maybe programs will link 
without it,

if I replace

*libgcc:
-lgcc

by 

*libgcc:

I get an error message that the specs file is malformed,

but other labels in that specs file have empty contents so why 
not this one,

also I havent figured out what %D means in:

*link_libgcc:
%D

Is there a way to customise specs files?

Are there any explanations of specs files on the internet?

also not figured out what ! means,


lazer1

*asm:
%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}

*asm_debug:
%{gstabs*:--gstabs}%{!gstabs*:%{g*:--gdwarf2}}

*asm_final:
%|

*asm_options:
%a %Y %{c:%W{o*}%{!o*:-o %w%b%O}}%{!c:-o %d%w%u%O}

*invoke_as:
%{!S:-o %{|!pipe:%g.s} |
 as %(asm_options) %{!pipe:%g.s} %A }

*cpp:
%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}

*cpp_options:
%(cpp_unique_options) %1 %{m*} %{std*} %{ansi} %{W*&pedantic*} %{w} %{f*} %{O*} %{undef}

*cpp_debug_options:
%{d*}

*cpp_unique_options:
%{C:%{!E:%eGNU C does not support -C without using -E}} %{CC:%{!E:%eGNU C does not support -CC without using -E}} %{!Q:-quiet} %{nostdinc*} %{C} %{CC} %{v} %{I*} %{P} %I %{MD:-MD %{!o:%b.d}%{o*:%.d%*}} %{MMD:-MMD %{!o:%b.d}%{o*:%.d%*}} %{M} %{MM} %{MF*} %{MG} %{MP} %{MQ*} %{MT*} %{!E:%{!M:%{!MM:%{MD|MMD:%{o*:-MQ %*}}}}} %{!no-gcc:-D__GNUC__=%v1 -D__GNUC_MINOR__=%v2 -D__GNUC_PATCHLEVEL__=%v3} %{!undef:%{!ansi:%{!std=*:%p}%{std=gnu*:%p}} %P} %{trigraphs} %{remap} %{g3:-dD} %{H} %C %{D*&U*&A*} %{i*} %Z %i %{E|M|MM:%W{o*}}

*trad_capable_cpp:
cc1 -E %{traditional|ftraditional|traditional-cpp:-traditional-cpp}

*cc1:
%(cc1_cpu) %{profile:-p}

*cc1_options:
%{pg:%{fomit-frame-pointer:%e-pg and -fomit-frame-pointer are incompatible}} %1 %{!Q:-quiet} -dumpbase %B %{d*} %{m*} %{a*} -auxbase%{c|S:%{o*:-strip %*}%{!o*: %b}}%{!c:%{!S: %b}} %{g*} %{O*} %{W*&pedantic*} %{w} %{std*} %{ansi} %{v:-version} %{pg:-p} %{p} %{f*} %{undef} %{Qn:-fno-ident} %{--help:--help} %{--target-help:--target-help} %{!fsyntax-only:%{S:%W{o*}%{!o*:-o %b.s}}} %{fsyntax-only:-o %j} %{-param*}

*cc1plus:


*link_gcc_c_sequence:
%G %L %G

*endfile:
-lautoinit

*link:
%{!static:--eh-frame-hdr} -m elf_i386

*lib:
-lamiga -larossupport -larosc -lm

*libgcc:
-lgcc

*startfile:
%{detach:detach.o%s} startup.o%s %{nix:nixmain.o%s}

*switches_need_spaces:


*predefines:


*cross_compile:
1

*version:
3.3.1

*multilib:
. ;

*multilib_defaults:


*multilib_extra:


*multilib_matches:


*multilib_exclusions:


*multilib_options:


*linker:
collect-aros

*link_libgcc:
%D

*md_exec_prefix:


*md_startfile_prefix:


*md_startfile_prefix_1:


*startfile_prefix_spec:


*cc1_cpu:
%{!mcpu*: %{m386:-mcpu=i386 %n`-m386' is deprecated. Use `-march=i386' or `-mcpu=i386' instead.
} %{m486:-mcpu=i486 %n`-m486' is deprecated. Use `-march=i486' or `-mcpu=i486' instead.
} %{mpentium:-mcpu=pentium %n`-mpentium' is deprecated. Use `-march=pentium' or `-mcpu=pentium' instead.
} %{mpentiumpro:-mcpu=pentiumpro %n`-mpentiumpro' is deprecated. Use `-march=pentiumpro' or `-mcpu=pentiumpro' instead.
}} %{mintel-syntax:-masm=intel %n`-mintel-syntax' is deprecated. Use `-masm=intel' instead.
} %{mno-intel-syntax:-masm=att %n`-mno-intel-syntax' is deprecated. Use `-masm=att' instead.
}

*link_command:
%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:    %(linker) %l %X %{o*} %{A} %{d} %{e*} %{m} %{N} %{n} %{r} %{s} %{t}    %{u*} %{x} %{z} %{Z} %{!A:%{!nostdlib:%{!nostartfiles:%S}}}    %{static:} %{L*} %(link_libgcc) %o %{!nostdlib:%{!nodefaultlibs:%(link_gcc_c_sequence)}}    %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} }}}}}}


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