undefined reference to `cabsl'

[BERTRAND Joël <joel.bertrand%systella.fr@localhost>]

	Hello,

	I'm trying to package RPL/2 (http://www.rpl2.net). I have modified some 
script to build a standalone version but final link stage aborts with :

../rplcas/lib/librplcas.a(6-usual.o): In function `giac::erf0(giac::gen 
const&, giac::gen&, giac::context const*)':
(.text+0x3abd2): undefined reference to `cabsl'
../rplcas/lib/librplcas.a(6-usual.o): In function `giac::erf0(giac::gen 
const&, giac::gen&, giac::context const*)':
(.text+0x3b69a): undefined reference to `cabsl'

	Of course, I have verified that /usr/lib/libm.so contains expected 
function.

	I have tried to swap libraries invocations without any success. I have 
tried to add -std=gnu11. Same result. When makefile tries to link 
programm, it runs :

g++  -Wall -Wextra -g -O2 -mtune=native -march=native  -O3 
-malign-double -mieee-fp -Wall -funsigned-char -g   -Wl,--export-dynamic 
-Wl,-R/usr/pkg/lib -Wl,-R/usr/pkg/gcc49/bin/../lib -Wl,-whole-archive 
../tools/openmotif-2.3.4/lib/Xm/.libs/libXm.a 
../tools/libXpm-3.5.9/src/.libs/libXpm.a ../tools/zlib-1.2.8/libz.a 
-L/usr/X11R7/lib -lXft -lXrender -L/usr/X11R7/lib 
-Wl,-rpath,/usr/X11R7/lib -lfontconfig  -L/usr/X11R7/lib 
-Wl,-rpath,/usr/X11R7/lib -lXft  -lXmu -Wl,-no-whole-archive  -o rpl
	(here: all object files)
../lapack/lapack/liblapack.a ../lapack/blas/libblas.a 
../tools/readline-6.3/libhistory.a ../tools/readline-6.3/libreadline.a 
../tools/ncurses-6.0/lib/libncurses.a 
../tools/libiconv-1.14/lib/.libs/libiconv.a 
../tools/openssl-1.0.2e/libcrypto.a ../tools/openssl-1.0.2e/libssl.a 
../tools/sqlite-3.9.2/.libs/libsqlite3.a 
../tools/libsigsegv-2.11/src/.libs/libsigsegv.a 
../tools/zlib-1.2.8/libz.a ../tools/gsl-2.1/.libs/libgsl.a 
../rplcas/lib/librplcas.a  -L/usr/X11R7/lib -R/usr/X11R7/lib 
-L/usr/X11R7/lib -lXt -lX11 -lXext -lgfortran -lpthread -lm  -lrt -lrt 
-lpthread

	As RPL/2 requires a fortran compiler, I have built gcc49 from pkgsrc tree :

legendre$ which gcc
/usr/pkg/gcc49/bin/gcc
legendre$ gcc -v
Utilisation des specs internes.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/pkg/gcc49/libexec/gcc/x86_64--netbsd/4.9.2/lto-wrapper
Target: x86_64--netbsd
Configuré avec: ../gcc-4.9.2/configure --enable-languages='c obj-c++ 
objc java fortran c++' --enable-shared --enable-long-long 
--with-local-prefix=/usr/pkg/gcc49 --enable-libssp 
--enable-threads=posix --with-boot-ldflags='-static-libstdc++ 
-static-libgcc -Wl,-R/usr/pkg/lib ' --with-gnu-ld --with-ld=/usr/bin/ld 
--with-gnu-as --with-as=/usr/bin/as --enable-nls 
--with-libiconv-prefix=/usr --with-gmp=/usr/pkg --with-mpc=/usr/pkg 
--with-mpfr=/usr/pkg --with-ecj-jar=/usr/pkgsrc/distfiles/ecj-4.5.jar 
--enable-java-home --with-os-directory=netbsd 
--with-arch-directory=amd64 --with-jvm-root-dir=/usr/pkg/java/gcc49 
--with-java-home=/usr/pkg/java/gcc49 --with-system-zlib 
--enable-__cxa_atexit --with-gxx-include-dir=/usr/pkg/gcc49/include/c++/ 
--prefix=/usr/pkg/gcc49 --build=x86_64--netbsd --host=x86_64--netbsd 
--infodir=/usr/pkg/gcc49/info --mandir=/usr/pkg/gcc49/man
Modèle de thread: posix
gcc version 4.9.2 (GCC)

	Without giac, RPL/2 can be built.

	Any idea ?

	Best regards,

	JKB