| the machine.h file. This can cause a good speedup, |
the machine.h file. This can cause a good speedup, |
| but also incorrect code with some gcc versions on |
but also incorrect code with some gcc versions on |
| some processors (default disabled). |
some processors (default disabled). |
| --enable-direct-threaded Force direct threading. This may not work on |
|
| some machines and may cause slowdown on others. |
|
| (default processor-dependent) |
|
| --enable-indirect-threaded Force indirect threading. This can cause a |
|
| slowdown on some machines. |
|
| (default processor-dependent) |
|
| --with-debug specifies option -g to compile with debug info (default) |
|
| --without-debug omits the -g switch and creates smaller images on |
|
| machines where strip has problems with gcc style |
|
| debugging informations. |
|
| --help: tells you about other parameters. |
--help: tells you about other parameters. |
| |
|
| The file Benchres shows which combination of the -enable options we |
The file Benchres shows which combination of the -enable options we |
| cross-compilation situation. You have to provide the results of these |
cross-compilation situation. You have to provide the results of these |
| tests by hand. E.g., if you compile for a 386 architecture processor: |
tests by hand. E.g., if you compile for a 386 architecture processor: |
| |
|
| env ac_cv_sizeof_char_p=4 ac_cv_sizeof_char=1 ac_cv_sizeof_short=2 ac_cv_sizeof_int=4 ac_cv_sizeof_long=4 ac_cv_sizeof_long_long=8 ac_cv_c_bigendian=no ./configure |
env ac_cv_sizeof_char_p=4 ac_cv_sizeof_char=1 ac_cv_sizeof_short=2 ac_cv_sizeof_int=4 ac_cv_sizeof_long=4 ac_cv_sizeof_long_long=8 ac_cv_sizeof_intptr_t=4 ac_cv_sizeof_int128_t=0 ac_cv_c_bigendian=no ./configure |
| |
|
| The ac_cv_sizeof_... variables give the sizes of various C types; |
The ac_cv_sizeof_... variables give the sizes of various C types; |
| ac_cv_sizeof_char_p is the same as "sizeof(char*)" in C code. The |
ac_cv_sizeof_char_p is the same as "sizeof(char*)" in C code. The |
