On Tue, 27 Oct 2020 at 06:53, Marc Glisse <marc.glisse@xxxxxxxx> wrote: > > On Tue, 27 Oct 2020, Maria Clara via Gcc-help wrote: > > > Hello. I am trying to configure gcc with: > > > > ./configure --prefix=/media/34GB/Arquivos-de-Programas-Linux/Gcc-4.9.4/GCC-4.94/ > > --with-gmp=/media/34GB/Arquivos-de-Programas-Linux/Gcc-4.9.4/Gmp-4.3.2/ > > --with-mpfr=/media/34GB/Arquivos-de-Programas-Linux/Gcc-4.9.4/Mpfr-2.4.2/ > > --with-mpc=/media/34GB/Arquivos-de-Programas-Linux/Gcc-4.9.4/Mpc-0.8.1/ > > --with-cloog=/media/34GB/Arquivos-de-Programas-Linux/Gcc-4.9.4/Cloog-0.18.1/ > > --with-isl=/media/34GB/Arquivos-de-Programas-Linux/Gcc-4.9.4/Isl-0.12.2/ > > > > and all I receive it is: > > > > checking for version 0.10 of ISL... no > > checking for version 0.11 of ISL... no > > checking for version 0.12 of ISL... no > > checking for version 0.14 of ISL... no > > checking for version 0.15 of ISL... no > > configure: error: Unable to find a usable ISL. See config.log for details. > > > > Then I proceeded to look in config.log. There I saw things like: > > > > configure:5894: checking for version 0.10 of ISL > > configure:5913: gcc -o conftest -g -O2 > > -I/media/34GB/Arquivos-de-Programas-Linux/Gcc-4.9.4/Isl-0.12.2//include > > -I/media/34GB/Arquivos-de-Programas-Linux/Gcc-4.9.4/Gmp-4.3.2//include > > -I/media/34GB/Arquivos-de-Programas-Linux/Gcc-4.9.4/Mpfr-2.4.2//include > > -I/media/34GB/Arquivos-de-Programas-Linux/Gcc-4.9.4/Mpc-0.8.1//include > > -L/media/34GB/Arquivos-de-Programas-Linux/Gcc-4.9.4/Isl-0.12.2//lib > > conftest.c -lisl >&5 > > configure:5913: $? = 0 > > configure:5913: ./conftest > > ./conftest: error while loading shared libraries: libisl.so.10: cannot > > open shared object file: No such file or directory > [...] > > See the first 2 questions of https://gcc.gnu.org/wiki/FAQ . Gcc does not > set a runpath, so you need to add one yourself (LD_LIBRARY_PATH, or > -Wl,-rpath,... I don't know where, possibly LDFLAGS, *_LDFLAGS, > LD_RUN_PATH, etc) or make sure one is not needed (install the shared > libraries in a standard location or use static libraries, as happens with > contrib/download_prerequisites). See also https://gcc.gnu.org/wiki/InstallingGCC You probably don't need to use ISL and Cloog anyway, the Graphite optimizations are optional, and not very useful.
