[Jool-list] It seems to me like the build system ignores EXTRA_FLAGS?

[Alberto Leiva]

Two cents:

Not sure if "x86_64-openwrt-linux-musl-gcc" implies that you're using gcc,
but at least in stock gcc, order matters. If you're going to force -largp,
do so at the end, along with the other libraries.

This is correct:
gcc -Wall -O2 -I./../../include -I/usr/include/libnl3    -g -O2   -o
jool_siit ../../common/netlink/jool_siit-config.o
../../common/stateless/jool_siit-xlat.o ../common/jool_siit-cJSON.o
../common/jool_siit-dns.o ../common/jool_siit-file.o
../common/jool_siit-jool.o ../common/jool_siit-netlink2.o
../common/jool_siit-str_utils.o ../common/argp/jool_siit-options.o
../common/nl/jool_siit-buffer.o ../common/target/jool_siit-bib.o
../common/target/jool_siit-eam.o ../common/target/jool_siit-global.o
../common/target/jool_siit-instance.o ../common/target/jool_siit-joold.o
../common/target/jool_siit-json.o ../common/target/jool_siit-log_time.o
../common/target/jool_siit-pool.o ../common/target/jool_siit-pool4.o
../common/target/jool_siit-pool6.o ../common/target/jool_siit-session.o
-lnl-genl-3 -lnl-3   -lpthread -lm

This spits lots of "undefined reference" errors (all I did was move the
"-l"s):
gcc -Wall -O2 -lnl-genl-3 -lnl-3   -lpthread -lm  -I./../../include
-I/usr/include/libnl3    -g -O2   -o jool_siit
../../common/netlink/jool_siit-config.o
../../common/stateless/jool_siit-xlat.o ../common/jool_siit-cJSON.o
../common/jool_siit-dns.o ../common/jool_siit-file.o
../common/jool_siit-jool.o ../common/jool_siit-netlink2.o
../common/jool_siit-str_utils.o ../common/argp/jool_siit-options.o
../common/nl/jool_siit-buffer.o ../common/target/jool_siit-bib.o
../common/target/jool_siit-eam.o ../common/target/jool_siit-global.o
../common/target/jool_siit-instance.o ../common/target/jool_siit-joold.o
../common/target/jool_siit-json.o ../common/target/jool_siit-log_time.o
../common/target/jool_siit-pool.o ../common/target/jool_siit-pool4.o
../common/target/jool_siit-pool6.o ../common/target/jool_siit-session.o

Here's a dicussion on this topic: http://stackoverflow.com/questions/45135
Also, have you seen this? https://github.com/openwrt/packages/issues/1535

BTW my responses are not arriving at "Leve-dev at lists.infradead.org".
Perhaps they haven't received anything.

On Thu, Dec 1, 2016 at 2:57 AM, Dan Lüdtke <mail at danrl.com> wrote:

>
> >     AC_SEARCH_LIBS([argp_parse], [argp])
>
>
> Result:
> > checking for pow... no
> > checking for library containing pow... -lm
> > checking for library containing pthread_create... -lpthread
> > checking for library containing argp_parse... none required <<<---
> > checking pkg-config is at least version 0.9.0... yes
> > checking for LIBNLGENL3... yes
> > checking that generated files are newer than configure... done
> > configure: creating ./config.status
> > config.status: creating Makefile
> > config.status: creating stateless/Makefile
> > config.status: creating stateful/Makefile
> > config.status: creating joold/Makefile
> > config.status: executing depfiles commands
>
> Sigh. It checks for the lib but doesn't think it needs it. Shouldn't this
> be running all under the same toolchain?
>
> I think it may be the LEDE build system that is screwing this one up. Or
> my Makefile is totally nuts (possible, not very experienced in LEDE build
> system).
>
> It get's worse. If I force -largp, the error stays the same:
> > x86_64-openwrt-linux-musl-gcc -Wall -O2 -largp -I./../../include
> -I/home/danrl/lede/nat64/source/staging_dir/target-x86_
> 64_musl-1.1.15/usr/include/libnl3     -o jool ../../common/netlink/jool-config.o
> ../../common/stateful/jool-xlat.o ../common/jool-cJSON.o
> ../common/jool-dns.o ../common/jool-file.o ../common/jool-jool.o
> ../common/jool-netlink2.o ../common/jool-str_utils.o
> ../common/argp/jool-options.o ../common/nl/jool-buffer.o
> ../common/target/jool-bib.o ../common/target/jool-eam.o
> ../common/target/jool-global.o ../common/target/jool-instance.o
> ../common/target/jool-joold.o ../common/target/jool-json.o
> ../common/target/jool-log_time.o ../common/target/jool-pool.o
> ../common/target/jool-pool4.o ../common/target/jool-pool6.o
> ../common/target/jool-session.o -L/home/danrl/lede/nat64/
> source/staging_dir/target-x86_64_musl-1.1.15/usr/lib -lnl-genl-3 -lnl-3
> -lpthread -lm
> > ../common/jool-jool.o: In function `main':
> > jool.c:(.text.startup+0x89): undefined reference to `argp_parse'
> > collect2: error: ld returned 1 exit status
> > Makefile:504: recipe for target 'jool' failed
> > make[6]: *** [jool] Error 1
>
>
> However, if I force -largp-standalone (nonexistent) the linker exits
> complaining about how it could not find the lib. This means, in the
> previous command (with forced -largp) the linker found the lib but did not
> think it helps linking argp_parse. Why is that?
>
>
> Maybe someone from LEDE can help explain this?
>
>
>
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