Using lex in a shared library

[Matthew Fleming]

On Fri, Jul 2, 2010 at 2:54 PM, Philip Herron <redbrain at gcc.gnu.org> wrote:
> On 2 July 2010 22:51, Matthew Fleming <mdf356 at gmail.com> wrote:
>> I have the following Makefile for a shared library at $work:
>>
>> ISI_TOP=        ../..
>>
>> LIB=            isi_date
>> SHLIB_MAJOR=    1
>> SHLIB_MINOR=    0
>> SRCS=           date.c date_parser.new.c lex.yy.c
>> INCS=           date.h
>> INCLUDEDIR=     /usr/include/isi_date
>>
>> YFLAGS+=        -vt
>> FLEX=           /usr/bin/flex
>> LDADD=          -ll
>>
>> CLEANFILES+=    date_parser.new.c y.tab.h y.tab.c lex.yy.c y.output \
>>                check_date.log test
>>
>> lex.yy.c: date_lexer.new.l
>>        ${FLEX} $>
>>
>> CFLAGS+=        -I${.CURDIR}
>> #CFLAGS+=       -g
>>
>> .include "${ISI_TOP}/isi.lib.mk"
>>
>>
>>
>> This builds fine as on i386.  I'm trying to get all our user-space to
>> be 64-bit clean, and I run into an error when building on amd64:
>>
>> /data/sb/BR_MDF_64CLEAN/obj/data/sb/BR_MDF_64CLEAN/src/tmp/usr/bin/ld:
>> /data/sb/BR_MDF_64CLEAN/obj/data/sb/BR_MDF_64CLEAN/src/tmp/usr/lib/libl.a(libyywrap.o):
>> relocation R_X86_64_32 can not be used when making a shared object;
>> recompile with -fPIC
>> /data/sb/BR_MDF_64CLEAN/obj/data/sb/BR_MDF_64CLEAN/src/tmp/usr/lib/libl.a:
>> could not read symbols: Bad value
>>
>> The following diff makes the compile work, but I have no idea (yet)
>> whether this will run, if it's the right solution, etc.
>>
>>
>> Index: usr.bin/lex/lib/Makefile
>> ===================================================================
>> --- usr.bin/lex/lib/Makefile    (revision 153343)
>> +++ usr.bin/lex/lib/Makefile    (working copy)
>> @@ -4,11 +4,16 @@
>>
>>  LIB=    ln
>>  SRCS=   libmain.c libyywrap.c
>> -NO_PIC=
>> +#NO_PIC=
>>
>> +SHLIB_MAJOR=   1
>> +SHLIB_MINOR=   0
>> +
>>  .if ${MK_INSTALLLIB} != "no"
>>  LINKS=  ${LIBDIR}/libln.a ${LIBDIR}/libl.a
>>  LINKS+=        ${LIBDIR}/libln.a ${LIBDIR}/libfl.a
>> +LINKS+=        ${LIBDIR}/libln.so ${LIBDIR}/libl.so
>> +LINKS+=        ${LIBDIR}/libln${LIB_SUFFIX}.so ${LIBDIR}/libl${LIB_SUFFIX}.so
>>  .endif
>>
>>  .if ${MK_PROFILE} != "no"
>
> Although maybe not helpful but have you considered using
> automake/libtool instead makes it so much simpler in my opinion.

Instead of... ?  Instead of this makefile?

Thanks,
matthew