[TravisCI] Add osx job (#234)

* parpack.hpp: don't use complex.h C macros.

* [BUG FIX] fix autotools build on osx.

* [TravisCI] Add osx job.

Full build but only partial testing as some tests crash on osx.

.travis.yml

@@ -29,6 +29,7 @@ services:
 
 stages:
   # order stages
+  - name: osx
   - name: precise
   - name: trusty
   - name: xenial
@@ -39,6 +40,45 @@ stages:
 
 jobs:
   include:
+  # osx <=> macOS 10.13 (high sierra)
+  - stage: osx
+    os: osx
+    osx_image: xcode10.1
+    before_install:
+    - brew list -1 | while read line; do brew unlink $line; done;
+    - brew list gcc      || brew install gcc
+    - brew list cmake    || brew install cmake
+    - brew list openblas || brew install openblas
+    - brew list lapack   || brew install lapack
+    - brew list openmpi  || brew install openmpi
+    - brew list -1 | while read line; do brew link --overwrite $line; done;
+    # full build but only partial testing as some tests crash on osx (no stack: if you get one, open an issue https://github.com/opencollab/arpack-ng/issues)
+    script: |
+      mkdir -p build && cd build && cmake -D EXAMPLES=ON -D MPI=ON -D ICB=ON  .. && make VERBOSE=1 && \
+      make test ARGS="-R  snbdr2_ex" && \
+      make test ARGS="-R  dnbdr2_ex" && \
+      make test ARGS="-R  cnbdr2_ex" && \
+      make test ARGS="-R  znbdr2_ex" && \
+      make test ARGS="-R psndrv1_ex" && \
+      make test ARGS="-R pdndrv1_ex" && \
+      make test ARGS="-R pcndrv1_ex"
+  - stage: osx
+    os: osx
+    osx_image: xcode10.1
+    before_install:
+    - brew list -1 | while read line; do brew unlink $line; done;
+    - brew list gcc      || brew install gcc
+    - brew list autoconf || brew install autoconf
+    - brew list automake || brew install automake
+    - brew list openblas || brew install openblas
+    - brew list lapack   || brew install lapack
+    - brew list openmpi  || brew install openmpi
+    - brew list -1 | while read line; do brew link --overwrite $line; done;
+    # full build but only partial testing as some tests crash on osx (no stack: if you get one, open an issue https://github.com/opencollab/arpack-ng/issues)
+    script: |
+      ./bootstrap && ./configure --enable-mpi --enable-icb && make VERBOSE=1 && \
+      cd $TRAVIS_BUILD_DIR/EXAMPLES/BAND        && make check TESTS="snbdr2 dnbdr2 cnbdr2 znbdr2" && \
+      cd $TRAVIS_BUILD_DIR/PARPACK/EXAMPLES/MPI && make check TESTS="psndrv1 pdndrv1 pcndrv1"
   # precise <=> test "older" systems, without ICB, without cmake (too old to be supported)
   - stage: precise
     dist: precise

ICB/parpack.hpp

@@ -132,10 +132,11 @@ inline void neupd(MPI_Fint comm, a_int rvec, howmny const howmny_option,
                   std::complex<float>* rwork, a_int& info)
 
 {
+  std::complex<float> sigma2 = sigma;
   internal::pcneupd_c(comm, rvec, internal::convert_to_char(howmny_option),
                       select, reinterpret_cast<_Complex float*>(d),
                       reinterpret_cast<_Complex float*>(z), ldz,
-                      std::real(sigma) + _Complex_I * std::imag(sigma),
+                      *reinterpret_cast<_Complex float*>(&sigma2),
                       reinterpret_cast<_Complex float*>(workev),
                       internal::convert_to_char(bmat_option), n,
                       internal::convert_to_char(which_option), nev, tol,
@@ -170,10 +171,11 @@ inline void neupd(MPI_Fint comm, a_int rvec, howmny const howmny_option,
                   a_int ldv, a_int* iparam, a_int* ipntr, std::complex<double>* workd,
                   std::complex<double>* workl, a_int lworkl,
                   std::complex<double>* rwork, a_int& info) {
+  std::complex<double> sigma2 = sigma;
   internal::pzneupd_c(comm, rvec, internal::convert_to_char(howmny_option),
                       select, reinterpret_cast<_Complex double*>(d),
                       reinterpret_cast<_Complex double*>(z), ldz,
-                      std::real(sigma) + _Complex_I * std::imag(sigma),
+                      *reinterpret_cast<_Complex double*>(&sigma2),
                       reinterpret_cast<_Complex double*>(workev),
                       internal::convert_to_char(bmat_option), n,
                       internal::convert_to_char(which_option), nev, tol,

configure.ac

@@ -140,6 +140,7 @@ if test x"$enable_icb" != x"no"; then
     AX_MPI([], AC_MSG_ERROR([could not compile a Fortran MPI test program]))
     FC=$MPIFC
     AC_FC_LIBRARY_LDFLAGS dnl set FCLIBS
+    AC_SUBST([MPI_Fortran_LIBS], ["$MPILIBS $FCLIBS"])
     AC_LANG_POP([Fortran])
 
     AC_LANG_PUSH([C])