Hi there, i tried to compile gcc-4.2.4 under ubuntu 11.10 because i need it for matlab/mex. Here are my steps: - Downloaded the source and extracted the zip in one folder - Made another folder compile/ and changed to that folder. - Called "sh /extractedFolder/configure --program-suffix=-4.2 --enable-languages=c,c++" - Called "make bootstrap" After 10 minutes i received an error (see below) about the gmp.h. Can somebody help me? Do I have to add other flags? I just want to install gcc-4.2 in parallel to my normal gcc so that i can call the compiler with gcc-4.2. Is it even possible to install it that way or do i have to switch to another distribution of ubuntu? Greets, mike. config.log: This file contains any messages produced by compilers while running configure, to aid debugging if configure makes a mistake. configure:630: checking host system type configure:651: checking target system type configure:669: checking build system type configure:724: checking for a BSD compatible install configure:777: checking whether ln works configure:801: checking whether ln -s works configure:1866: checking for gcc configure:1979: checking whether the C compiler (gcc ) works configure:1995: gcc -o conftest conftest.c 1>&5 configure:2021: checking whether the C compiler (gcc ) is a cross-compiler configure:2026: checking whether we are using GNU C configure:2035: gcc -E conftest.c configure:2054: checking whether gcc accepts -g configure:2121: checking for gnatbind configure:2186: checking whether compiler driver understands Ada configure:2218: checking how to compare bootstrapped objects configure:2338: checking for correct version of gmp.h configure:2351: gcc -c -g -O2 -I/home/simon/Downloads/compile/gmp conftest.c 1>&5 configure:2341:17: fatal error: gmp.h: No such file or directory compilation terminated. configure: failed program was: #line 2340 "configure" #include "confdefs.h" #include "gmp.h" int main() { #if __GNU_MP_VERSION < 4 || (__GNU_MP_VERSION == 4 && __GNU_MP_VERSION_MINOR < 1) choke me #endif ; return 0; } configure:3513: checking for bison configure:3513: checking for byacc configure:3513: checking for yacc configure:3553: checking for bison configure:3592: checking for gm4 configure:3592: checking for gnum4 configure:3592: checking for m4 configure:3631: checking for flex configure:3631: checking for lex configure:3671: checking for flex configure:3710: checking for makeinfo configure:3763: checking for expect configure:3804: checking for runtest configure:3852: checking for i686-pc-linux-gnu-ar configure:3883: checking for ar configure:3927: checking for i686-pc-linux-gnu-as configure:3958: checking for as configure:4002: checking for i686-pc-linux-gnu-dlltool configure:4033: checking for dlltool configure:4077: checking for i686-pc-linux-gnu-ld configure:4108: checking for ld configure:4152: checking for i686-pc-linux-gnu-lipo configure:4183: checking for lipo configure:4227: checking for i686-pc-linux-gnu-nm configure:4258: checking for nm configure:4302: checking for i686-pc-linux-gnu-ranlib configure:4333: checking for ranlib configure:4372: checking for i686-pc-linux-gnu-strip configure:4403: checking for strip configure:4442: checking for i686-pc-linux-gnu-windres configure:4473: checking for windres configure:4517: checking for i686-pc-linux-gnu-objcopy configure:4548: checking for objcopy configure:4592: checking for i686-pc-linux-gnu-objdump configure:4623: checking for objdump configure:4704: checking for i686-pc-linux-gnu-cc configure:4735: checking for cc configure:4797: checking for i686-pc-linux-gnu-c++ configure:4828: checking for c++ configure:4890: checking for i686-pc-linux-gnu-gcc configure:4921: checking for gcc configure:4978: checking for i686-pc-linux-gnu-gcj configure:5009: checking for gcj configure:5071: checking for i686-pc-linux-gnu-gfortran configure:5102: checking for gfortran configure:5229: checking for ar configure:5283: checking for i686-pc-linux-gnu-ar configure:5314: checking for ar configure:5384: checking for as configure:5438: checking for i686-pc-linux-gnu-as configure:5469: checking for as configure:5539: checking for dlltool configure:5593: checking for i686-pc-linux-gnu-dlltool configure:5624: checking for dlltool configure:5694: checking for ld configure:5748: checking for i686-pc-linux-gnu-ld configure:5779: checking for ld configure:5849: checking for lipo configure:5903: checking for i686-pc-linux-gnu-lipo configure:5934: checking for lipo configure:6004: checking for nm configure:6058: checking for i686-pc-linux-gnu-nm configure:6089: checking for nm configure:6159: checking for objdump configure:6213: checking for i686-pc-linux-gnu-objdump configure:6244: checking for objdump configure:6314: checking for ranlib configure:6368: checking for i686-pc-linux-gnu-ranlib configure:6399: checking for ranlib configure:6469: checking for strip configure:6523: checking for i686-pc-linux-gnu-strip configure:6554: checking for strip configure:6624: checking for windres configure:6678: checking for i686-pc-linux-gnu-windres configure:6709: checking for windres configure:6759: checking where to find the target ar configure:6792: checking where to find the target as configure:6825: checking where to find the target cc configure:6858: checking where to find the target c++ configure:6894: checking where to find the target c++ for libstdc++ configure:6930: checking where to find the target dlltool configure:6963: checking where to find the target gcc configure:6996: checking where to find the target gcj configure:7032: checking where to find the target gfortran configure:7068: checking where to find the target ld configure:7101: checking where to find the target lipo configure:7124: checking where to find the target nm configure:7157: checking where to find the target objdump configure:7190: checking where to find the target ranlib configure:7223: checking where to find the target strip configure:7256: checking where to find the target windres configure:7317: checking whether to enable maintainer-specific portions of Makefiles configure:7366: checking whether -fkeep-inline-functions is supported configure:7381: gcc -c -g -O2 -fkeep-inline-functions conftest.c 1>&5 -- View this message in context: http://old.nabble.com/gcc-4.2.4-compilation-under-ubuntu-11.10-tp33763689p33763689.html Sent from the gcc - Help mailing list archive at Nabble.com.