lapack.h only installed in LAPACKE builds

[christoph-conrads]

Description

The header lapack.h is only installed if LAPACKE is enabled (cmake -DLAPACKE=ON). lapack.h is completely independent of LAPACKE and thus my expectation is that it is always installed and working.

Since the LAPACK 3.10 release, the issue has gotten more urgent because even LAPACK code (e.g., code in TESTING/ directory) cannot access lapack.h anymore without LAPACKE=ON because the lapacke_mangling.h header is only generated when LAPACKE is enabled. This adds needlessly to compile times.

Checklist

• I've included a minimal example to reproduce the issue
• I'd be willing to make a PR to solve this issue

[langou]

Hi Christoph, it would be great to have a PR on this. Julien.

[christoph-conrads]

Hi Christoph, it would be great to have a PR on this. Julien.

Ok. The pull request will also fix the behavior when the user passed -DBUILD_DOUBLE=OFF or -DBUILD_SINGLE=OFF on the CMake command line but not -DBUILD_COMPLEX16=OFF or -DBUILD_COMPLEX=OFF:

$ env LDFLAGS='-Wl,-z,defs' cmake -DBUILD_SHARED_LIBS=ON -DBUILD_DOUBLE=OFF -DBUILD_COMPLEX=OFF -DBUILD_SINGLE=OFF ~/lapack/
...
$ make
...
[100%] Linking Fortran shared library ../lib/liblapack.so
/usr/bin/ld: CMakeFiles/lapack.dir/zgesvdx.f.o: in function `zgesvdx_':
zgesvdx.f:(.text+0x737): undefined reference to `dbdsvdx_'
/usr/bin/ld: zgesvdx.f:(.text+0xcbd): undefined reference to `dbdsvdx_'
/usr/bin/ld: zgesvdx.f:(.text+0x1230): undefined reference to `dbdsvdx_'
/usr/bin/ld: zgesvdx.f:(.text+0x15e8): undefined reference to `dbdsvdx_'
/usr/bin/ld: CMakeFiles/lapack.dir/zggbal.f.o: in function `zggbal_':
zggbal.f:(.text+0xe3e): undefined reference to `ddot_'
/usr/bin/ld: zggbal.f:(.text+0xe75): undefined reference to `ddot_'
/usr/bin/ld: zggbal.f:(.text+0x1395): undefined reference to `ddot_'
/usr/bin/ld: zggbal.f:(.text+0x13d1): undefined reference to `ddot_'
/usr/bin/ld: CMakeFiles/lapack.dir/zlacrm.f.o: in function `zlacrm_':
zlacrm.f:(.text+0x148): undefined reference to `dgemm_'
/usr/bin/ld: zlacrm.f:(.text+0x224): undefined reference to `dgemm_'
/usr/bin/ld: CMakeFiles/lapack.dir/zlals0.f.o: in function `zlals0_':
zlals0.f:(.text+0x90e): undefined reference to `dgemv_'
/usr/bin/ld: zlals0.f:(.text+0x9cf): undefined reference to `dgemv_'
/usr/bin/ld: zlals0.f:(.text+0xfa3): undefined reference to `dgemv_'
/usr/bin/ld: zlals0.f:(.text+0x1074): undefined reference to `dgemv_'
/usr/bin/ld: CMakeFiles/lapack.dir/zlalsa.f.o: in function `zlalsa_':
zlalsa.f:(.text+0x407): undefined reference to `dgemm_'
/usr/bin/ld: zlalsa.f:(.text+0x508): undefined reference to `dgemm_'
/usr/bin/ld: zlalsa.f:(.text+0x6e2): undefined reference to `dgemm_'
/usr/bin/ld: zlalsa.f:(.text+0x7f5): undefined reference to `dgemm_'
/usr/bin/ld: zlalsa.f:(.text+0x119a): undefined reference to `dgemm_'
/usr/bin/ld: CMakeFiles/lapack.dir/zlalsa.f.o:zlalsa.f:(.text+0x129d): more undefined references to `dgemm_' follow
/usr/bin/ld: CMakeFiles/lapack.dir/cpotrs.f.o: in function `cpotrs_':
cpotrs.f:(.text+0x184): undefined reference to `ctrsm_'
/usr/bin/ld: cpotrs.f:(.text+0x1c5): undefined reference to `ctrsm_'
/usr/bin/ld: cpotrs.f:(.text+0x229): undefined reference to `ctrsm_'
/usr/bin/ld: cpotrs.f:(.text+0x26a): undefined reference to `ctrsm_'
/usr/bin/ld: CMakeFiles/lapack.dir/cgetrs.f.o: in function `cgetrs_':
cgetrs.f:(.text+0x1be): undefined reference to `claswp_'
/usr/bin/ld: cgetrs.f:(.text+0x1fe): undefined reference to `ctrsm_'
/usr/bin/ld: cgetrs.f:(.text+0x23c): undefined reference to `ctrsm_'
/usr/bin/ld: cgetrs.f:(.text+0x29a): undefined reference to `ctrsm_'
/usr/bin/ld: cgetrs.f:(.text+0x2db): undefined reference to `ctrsm_'
/usr/bin/ld: cgetrs.f:(.text+0x318): undefined reference to `claswp_'
/usr/bin/ld: CMakeFiles/lapack.dir/cpotrf.f.o: in function `cpotrf_':
cpotrf.f:(.text+0x23b): undefined reference to `cherk_'
/usr/bin/ld: cpotrf.f:(.text+0x260): undefined reference to `cpotrf2_'
/usr/bin/ld: cpotrf.f:(.text+0x2f9): undefined reference to `cgemm_'
/usr/bin/ld: cpotrf.f:(.text+0x36a): undefined reference to `ctrsm_'
/usr/bin/ld: cpotrf.f:(.text+0x4d1): undefined reference to `cherk_'
/usr/bin/ld: cpotrf.f:(.text+0x4f6): undefined reference to `cpotrf2_'
/usr/bin/ld: cpotrf.f:(.text+0x593): undefined reference to `cgemm_'
/usr/bin/ld: cpotrf.f:(.text+0x609): undefined reference to `ctrsm_'
/usr/bin/ld: cpotrf.f:(.text+0x3a6): undefined reference to `cpotrf2_'
/usr/bin/ld: CMakeFiles/lapack.dir/cgetrf.f.o: in function `cgetrf_':
cgetrf.f:(.text+0x1d1): undefined reference to `cgetrf2_'
/usr/bin/ld: cgetrf.f:(.text+0x26b): undefined reference to `claswp_'
/usr/bin/ld: cgetrf.f:(.text+0x34d): undefined reference to `claswp_'
/usr/bin/ld: cgetrf.f:(.text+0x3f1): undefined reference to `ctrsm_'
/usr/bin/ld: cgetrf.f:(.text+0x49e): undefined reference to `cgemm_'
/usr/bin/ld: cgetrf.f:(.text+0x2ee): undefined reference to `cgetrf2_'
/usr/bin/ld: CMakeFiles/lapack.dir/dbdsdc.f.o: in function `dbdsdc_':
dbdsdc.f:(.text+0x4c3): undefined reference to `dswap_'
/usr/bin/ld: dbdsdc.f:(.text+0x4ea): undefined reference to `dswap_'
/usr/bin/ld: CMakeFiles/lapack.dir/dbdsqr.f.o: in function `dbdsqr_':
dbdsqr.f:(.text+0x6eb): undefined reference to `drot_'
/usr/bin/ld: dbdsqr.f:(.text+0x79a): undefined reference to `drot_'
/usr/bin/ld: dbdsqr.f:(.text+0x82b): undefined reference to `drot_'
/usr/bin/ld: dbdsqr.f:(.text+0x9bf): undefined reference to `dswap_'
/usr/bin/ld: dbdsqr.f:(.text+0xa23): undefined reference to `dswap_'
/usr/bin/ld: dbdsqr.f:(.text+0xa59): undefined reference to `dswap_'
/usr/bin/ld: CMakeFiles/lapack.dir/dlaed0.f.o: in function `dlaed0_':
dlaed0.f:(.text+0x678): undefined reference to `dgemm_'
/usr/bin/ld: CMakeFiles/lapack.dir/dlaed2.f.o: in function `dlaed2_':
dlaed2.f:(.text+0xd69): undefined reference to `drot_'
/usr/bin/ld: CMakeFiles/lapack.dir/dlaed3.f.o: in function `dlaed3_':
dlaed3.f:(.text+0x354): undefined reference to `dgemm_'
/usr/bin/ld: dlaed3.f:(.text+0x3d6): undefined reference to `dgemm_'
/usr/bin/ld: CMakeFiles/lapack.dir/dlaed7.f.o: in function `dlaed7_':
dlaed7.f:(.text+0x57f): undefined reference to `dgemm_'
/usr/bin/ld: CMakeFiles/lapack.dir/dlaed8.f.o: in function `dlaed8_':
dlaed8.f:(.text+0xc7e): undefined reference to `drot_'
/usr/bin/ld: CMakeFiles/lapack.dir/dlaeda.f.o: in function `dlaeda_':
dlaeda.f:(.text+0x316): undefined reference to `drot_'
/usr/bin/ld: dlaeda.f:(.text+0x3b2): undefined reference to `drot_'
/usr/bin/ld: dlaeda.f:(.text+0x526): undefined reference to `dgemv_'
/usr/bin/ld: dlaeda.f:(.text+0x5c6): undefined reference to `dgemv_'
/usr/bin/ld: CMakeFiles/lapack.dir/dlasd2.f.o: in function `dlasd2_':
dlasd2.f:(.text+0x816): undefined reference to `drot_'
/usr/bin/ld: dlasd2.f:(.text+0x847): undefined reference to `drot_'
/usr/bin/ld: CMakeFiles/lapack.dir/dlasd3.f.o: in function `dlasd3_':
dlasd3.f:(.text+0x853): undefined reference to `dgemm_'
/usr/bin/ld: dlasd3.f:(.text+0x939): undefined reference to `dgemm_'
/usr/bin/ld: dlasd3.f:(.text+0xabb): undefined reference to `dgemm_'
/usr/bin/ld: dlasd3.f:(.text+0xc71): undefined reference to `dgemm_'
/usr/bin/ld: dlasd3.f:(.text+0xd02): undefined reference to `dgemm_'
/usr/bin/ld: CMakeFiles/lapack.dir/dlasd3.f.o:dlasd3.f:(.text+0xd8e): more undefined references to `dgemm_' follow
/usr/bin/ld: CMakeFiles/lapack.dir/dlasd7.f.o: in function `dlasd7_':
dlasd7.f:(.text+0x793): undefined reference to `drot_'
/usr/bin/ld: dlasd7.f:(.text+0x7cc): undefined reference to `drot_'
/usr/bin/ld: dlasd7.f:(.text+0xae1): undefined reference to `drot_'
/usr/bin/ld: dlasd7.f:(.text+0xb0a): undefined reference to `drot_'
/usr/bin/ld: CMakeFiles/lapack.dir/dlasd8.f.o: in function `dlasd8_':
dlasd8.f:(.text+0x681): undefined reference to `ddot_'
/usr/bin/ld: dlasd8.f:(.text+0x6ad): undefined reference to `ddot_'
/usr/bin/ld: CMakeFiles/lapack.dir/dlasdq.f.o: in function `dlasdq_':
dlasdq.f:(.text+0x730): undefined reference to `dswap_'
/usr/bin/ld: dlasdq.f:(.text+0x769): undefined reference to `dswap_'
/usr/bin/ld: dlasdq.f:(.text+0x794): undefined reference to `dswap_'
/usr/bin/ld: CMakeFiles/lapack.dir/dstedc.f.o: in function `dstedc_':
dstedc.f:(.text+0x957): undefined reference to `dgemm_'
/usr/bin/ld: dstedc.f:(.text+0xa3b): undefined reference to `dswap_'
/usr/bin/ld: CMakeFiles/lapack.dir/dsteqr.f.o: in function `dsteqr_':
dsteqr.f:(.text+0x1323): undefined reference to `dswap_'
collect2: error: ld returned 1 exit status
make[2]: *** [SRC/CMakeFiles/lapack.dir/build.make:8545: lib/liblapack.so.3.10.0] Error 1
make[1]: *** [CMakeFiles/Makefile2:164: SRC/CMakeFiles/lapack.dir/all] Error 2
make: *** [Makefile:152: all] Error 2