> Run e.g. > echo "int main() {}"|/opt/XXX/bin/g++ -xc++ - -v >
The output is Target: x86_64-unknown-linux-gnu Configured with: ../configure --prefix=/opt/XXX Thread model: posix gcc version 4.8.2 (GCC) COLLECT_GCC_OPTIONS='-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64' /opt/XXX/libexec/gcc/x86_64-unknown-linux-gnu/4.8.2/cc1plus -quiet -v -D_GNU_SOURCE - -quiet -dumpbase - -mtune=generic -march=x86-64 -auxbase - -version -o /tmp/ccXHzSkQ.s GNU C++ (GCC) version 4.8.2 (x86_64-unknown-linux-gnu) compiled by GNU C version 4.8.2, GMP version 4.3.2, MPFR version 2.4.2, MPC version 0.8.1 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 ignoring nonexistent directory "/opt/XXX/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/../../../../x86_64-unknown-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: /opt/XXX/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/../../../../include/c++/4.8.2 /opt/XXX/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/../../../../include/c++/4.8.2/x86_64-unknown-linux-gnu /opt/XXX/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/../../../../include/c++/4.8.2/backward /opt/XXX/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/include /usr/local/include /opt/XXX/include /opt/XXX/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/include-fixed /usr/include End of search list. GNU C++ (GCC) version 4.8.2 (x86_64-unknown-linux-gnu) compiled by GNU C version 4.8.2, GMP version 4.3.2, MPFR version 2.4.2, MPC version 0.8.1 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: d8088594c0e624acf8c1ee4300a343b6 COLLECT_GCC_OPTIONS='-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64' as -v --64 -o /tmp/ccytHs8u.o /tmp/ccXHzSkQ.s GNU assembler version 2.17.50.0.6-26.el5 (x86_64-redhat-linux) using BFD version 2.17.50.0.6-26.el5 20061020 COMPILER_PATH=/opt/XXX/libexec/gcc/x86_64-unknown-linux-gnu/4.8.2/:/opt/XXX/libexec/gcc/x86_64-unknown-linux-gnu/4.8.2/:/opt/XXX/libexec/gcc/x86_64-unknown-linux-gnu/:/opt/XXX/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/:/opt/XXX/lib/gcc/x86_64-unknown-linux-gnu/ LIBRARY_PATH=/opt/XXX/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/:/opt/XXX/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/opt/XXX/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/../../../:/lib/:/usr/lib/ COLLECT_GCC_OPTIONS='-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64' /opt/XXX/libexec/gcc/x86_64-unknown-linux-gnu/4.8.2/collect2 --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 /usr/lib/../lib64/crt1.o /usr/lib/../lib64/crti.o /opt/XXX/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/crtbegin.o -L/opt/XXX/lib/gcc/x86_64-unknown-linux-gnu/4.8.2 -L/opt/XXX/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/../../../../lib64 -L/lib/../lib64 -L/usr/lib/../lib64 -L/opt/XXX/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/../../.. /tmp/ccytHs8u.o -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /opt/XXX/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/crtend.o /usr/lib/../lib64/crtn.o I suppose it is the line LIBRARY_PATH=/opt/XXX/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/:/opt/XXX/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/opt/XXX/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/../../../:/lib/:/usr/lib/ I see that /usr/lib64 (where libcurl.so.3 resides) is before /opt/XXX/lib (where libcurl.so.4 resides). That's why g++ links against the wrong library. However, this problem would not occur if I could stop cmake from replacing /opt/XXX/lib/libcurl.so by -lcurl :-( Volker
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