Something

no-common -g -O3 -W -Wall -Wundef -Wfloat-equal -Wshadow -Wunreachable-code -Win
line -Wconversion  -L/usr/X11R6/lib -L/usr/local/lib -pipe -fno-strict-aliasing
-fno-common -g -O3 -W -Wall -Wundef -Wfloat-equal -Wshadow -Wunreachable-code -W
inline -Wconversion -o libpng.la -rpath /usr/testcad/lib -version-info 3:5:2 png
.lo pngerror.lo pnggccrd.lo pngget.lo pngmem.lo pngpread.lo pngread.lo pngrio.lo
 pngrtran.lo pngrutil.lo pngset.lo pngtrans.lo pngvcrd.lo pngwio.lo pngwrite.lo
pngwtran.lo pngwutil.lo ../../../src/other/libz/libz.la
gcc -shared  .libs/png.o .libs/pngerror.o .libs/pnggccrd.o .libs/pngget.o .libs/
pngmem.o .libs/pngpread.o .libs/pngread.o .libs/pngrio.o .libs/pngrtran.o .libs/
pngrutil.o .libs/pngset.o .libs/pngtrans.o .libs/pngvcrd.o .libs/pngwio.o .libs/
pngwrite.o .libs/pngwtran.o .libs/pngwutil.o  -Wl,--rpath -Wl,/home/FthrNtr/brlc
ad-7.8.4/src/other/libz/.libs -Wl,--rpath -Wl,/usr/testcad/lib -L/usr/X11R6/lib
-L/usr/local/lib ../../../src/other/libz/.libs/libz.so.2.4  -Wl,-soname -Wl,libp
ng.so.3.5 -o .libs/libpng.so.3.5
collect2: ld returned 1 exit status
make[3]: *** [libpng.la] Error 1
make[3]: Leaving directory `/home/FthrNtr/brlcad-7.8.4/src/other/libpng'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/FthrNtr/brlcad-7.8.4/src/other'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/FthrNtr/brlcad-7.8.4/src'
make: *** [all-recursive] Error 1

IriX64@FthrNtr /home/FthrNtr/brlcad-7.8.4
$