Afterwards another problem arose (after I built gcc with default config): Could not build xemacs 21.1.14, configure with defaults produced: (I reported this to xemacs team) int main() { db_open() ; return 0; } configure:11860: checking for dlfcn.h configure:11868: gcc -E -I/usr/X11/include conftest.c >/dev/null 2>conftest.out configure:11899: checking for dlopen in -ldl configure:11915: gcc -o conftest -g -O3 -Wall -Wno-switch -I/usr/X11/include -L/usr/X11/lib conftest.c -ldl -lXm -lcompface -ltiff -ljpeg -lz -lXmu -lXt -lXext -lX11 -lSM -lICE -lgdbm -lgpm -lncurses -lm -lshell32 -lgdi32 -luser32 -lcomctl32 -lgcc -lc -lgcc /usr/lib/crtn.o 1>&5 configure:12145: checking how to build a shared library configure:12236: checking for dlerror configure:12262: gcc -o conftest -g -O3 -Wall -Wno-switch -I/usr/X11/include -L/usr/X11/lib conftest.c -lXm -lcompface -ltiff -ljpeg -lz -lXmu -lXt -lXext -lX11 -lSM -lICE -ldl -lgdbm -lgpm -lncurses -lm -lshell32 -lgdi32 -luser32 -lcomctl32 -lgcc -lc -lgcc /usr/lib/crtn.o 1>&5 configure:12302: gcc -o conftest -g -O3 -Wall -Wno-switch -I/usr/X11/include -L/usr/X11/lib conftest.c -lXm -lcompface -ltiff -ljpeg -lz -lXmu -lXt -lXext -lX11 -lSM -lICE -ldl -lgdbm -lgpm -lncurses -lm -lshell32 -lgdi32 -luser32 -lcomctl32 -lgcc -lc -lgcc /usr/lib/crtn.o 1>&5 ./configure: line 12325: 25422 Segmentation fault ./conftest configure: failed program was: #line 12298 "configure" #include "confdefs.h" int main(int c,char *v[]){return 0;}