Using lex in a shared library

Philip Herron redbrain at gcc.gnu.org
Fri Jul 2 21:54:29 UTC 2010


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"
>
>
> Thanks,
> matthew
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>

Although maybe not helpful but have you considered using
automake/libtool instead makes it so much simpler in my opinion.

--Phil


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