install issue: Required package LAPACK not found.

[gigglesun]

I follow the installation guide to install latest 3.14 IPOPT on a cent os which has already installed lapack before and always get this LAPACK related error message:

Command example 1:

../configure  --prefix=${IPOPT_INSTALL_PATH}

I got

configure: error: Required package LAPACK not found

Command example 2:

../configure  --without-lapack --prefix=${IPOPT_INSTALL_PATH}

I got

configure: error: Required package LAPACK not found

seems the --without-lapack command do not take effect.

Command example 3:

../configure  --with-lapack-lflags="-L/usr/local/opt/lapack/lib/ -llapack -lblas" --prefix=${IPOPT_INSTALL_PATH}

I got

error: Cannot link to user-specified -L/usr/local/opt/lapack/lib/ -llapack -lblas.

seems the --with-lapack-lflags command do not take effect.

Command example 4:

export LIBRARY_PATH=/usr/local/opt/lapack/lib:${LIBRARY_PATH}
../configure  --with-lapack --prefix=${IPOPT_INSTALL_PATH}

I got

configure: error: Required package LAPACK not found

[svigerske]

The third example (setting --with-lapack-lflags) is the one that should be used if Lapack isn't installed in a default location. You'll have to look into config.log regarding details on why the link check has failed. Maybe there are more linker flags necessary.

[gigglesun]

The third example (setting --with-lapack-lflags) is the one that should be used if Lapack isn't installed in a default location. You'll have to look into config.log regarding details on why the link check has failed. Maybe there are more linker flags necessary.

Thanks for your reply and help @svigerske , after checking the config.log and there is some dlopen related error, and add -ldl linker flags, it can configure successfully, the command I used is as below:

../configure  --disable-java --with-lapack-lflags="-L/usr/local/opt/lapack/lib/ -llapack -lblas -ldl" --prefix=${IPOPT_INSTALL_PATH}