On Mon, Aug 10, 2009 at 12:45, Philip
Herron<herron.philip@xxxxxxxxxxxxxx> wrote:
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> Andrew W. Nosenko wrote:
>> On Mon, Aug 10, 2009 at 12:07, Philip
>> Herron<herron.philip@xxxxxxxxxxxxxx> wrote:
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>>> Andrew W. Nosenko wrote:
>>>> On Mon, Aug 10, 2009 at 03:44, Philip
>>>> Herron<herron.philip@xxxxxxxxxxxxxx> wrote:
>>>>> Hey guys
>>>>>
>>>>> I have a project i am using GNU MP and MPFR for, and i am using:
>>>>>
>>>>> ACX_PTHREAD(,AC_MSG_ERROR(could not find libpthread))
>>>>> LIBS="${PTHREAD_LIBS} ${LIBS}" AM_CFLAGS="${PTHREAD_CFLAGS}
>>>>> ${AM_CFLAGS}" CC="$PTHREAD_CC"
>>>>>
>>>>> AC_CHECK_LIB([gmp], [__gmpz_init], , [AC_MSG_ERROR([GNU MP not
>>>>> found, see http://gmplib.org/])]) AC_CHECK_LIB([mpfr],[mpfr_init]
>>>>> , [AC_MSG_ERROR([MPFR not found, see http://www.mpfr.org/])])
>>>>>
>>>>> The pthreads comes from a macro acx_pthreads.m4 i think, but the
>>>>> gmp and mpfr are the problem, I have on a mac machine the
>>>>> libraries in /usr/local/lib and the headers in
>>>>> /usr/local/include, but on my bsd and linux machines its all in
>>>>> /usr
>>>>>
>>>>> The linux and bsd is ok with ac_check_lib, but on mac no, is
>>>>> there a way to pass the library path and header path? To give -I
>>>>> and -L to gcc or sun compilers ( i have only been using these
>>>>> compilers so far ) or whatever compiler.
>>>>>
>>>>>
>>>>> I can't seem to find anything on this.
>>>>>
>>>> 1. Try to use -pthread compiler option (or analog, depends on
>>>> compiler) instead of linking around libpthread directly. Sometime
>>>> the true name of thread library may be different. Sometime systems
>>>> have more than one thread library.
>>>>
>>>> 2. IIRC, on Mac OS X you don't need any special library or flag at
>>>> all. All pthread functionality is a part of libSystem (mac analog
>>>> of libc) and libpthread is just a symlink to it.
>>> My question wasn't on pthreads i'm using a macro i found for that:
>>> http://ac-archive.sourceforge.net/ac-archive/acx_pthread.html
>>>
>>> But the mpfr and gmp libs are the problem, as they are in different
>>> paths on both systems. But thanks because i don't know mac os that
>>> well just have access to it for a while for some dev.
>>>
>>
>> Sorry. I didn't understand your needs.
>>
>> Seems like your compiler doesn't search /usr/local/ hierarchy or its
>> analog (at least it is common case on FreeBSD).
>>
>> I workaround it by following code:
>>
>> AC_CANONICAL_HOST
>>
>> # Workaround OS related problems in the default search path:
>> # o FreeBSD bug: GCC on FreeBSD doesn't search
>> # /usr/local/include and /usr/local/lib directories.
>> # o MacOS X/Darwin problem: GCC on Darwin doesn't search
>> # /opt/local/include and /opt/local/lib directories.
>> #
>> case "$host_os" in
>> freebsd*)
>> CPPFLAGS="$CPPFLAGS -I/usr/local/include"
>> LDFLAGS="$LDFLAGS -L/usr/local/lib"
>> ;;
>> darwin*)
>> CPPFLAGS="$CPPFLAGS -I/opt/local/include"
>> LDFLAGS="$LDFLAGS -L/opt/local/lib"
>> ;;
>> esac
>>
>> # ... AC_CHECK_LIB, AC_CHECK_HEADER, AC_CHECK_ waht you want
>>
>> Hope, it will help.
>>
>
> Ah this is nice! Thanks are these flags -I and -L still working on
> other compilers other than gcc? like sun etc would be nice. I am
> thinking i might keep this snippet for a while, but i might introduce
> a cmd line switch like gmp-lib-dir=/opt.... etc :)
>
'-I', '-l' and '-L' are standard flags supported by any C/C++ compiler.
--
Andrew W. Nosenko <andrew.w.nosenko@xxxxxxxxx>
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