The R Project SVN – R – Diff – /trunk/m4/openmp.m4



 
# [a small part, modified for clang and Intel in 2015,6, Solaris in 2017.]
# [Change for Intel preferring -fiopenmp and deprecating -fopenmp in 2023.]
 
# _AC_LANG_OPENMP is a language-dependent program defined in c.m4 in
# the autoconf library.  And this is a modification of its AC_OPENMP
 
# R_OPENMP
# --------
# Check which options need to be passed to the C compiler to support OpenMP.
# Set the OPENMP_CFLAGS / OPENMP_CXXFLAGS / OPENMP_FFLAGS variable to these

      [ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp],
      [AC_LINK_IFELSE([_AC_LANG_OPENMP],
	 [ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp='none needed'],
	 [ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp='unsupported'
	  dnl Try these flags:
	  dnl   GCC >= 4.2, clang >= 3.8, flang-new -fopenmp
	  dnl   clang 3.7.x	      -fopenmp=libomp
	  dnl   (-fopenmp was accepted but does not work)
	  dnl   Oracle C, Fortran     -xopenmp
          dnl   (also accepts -fopenmp as from 12.4, but does not work in 12.5)
	  dnl   'Classic' Intel C, Fortran      -qopenmp
	  dnl   Intel                 -openmp (deprecated)
          dnl   (https://software.intel.com/en-us/node/581863,
	  dnl    https://software.intel.com/en-us/node/525020)
	  dnl   2023 Intel: prefers -fiopenmp
	  dnl   SGI C, PGI C          -mp
	  dnl   Tru64 Compaq C        -omp
	  dnl   IBM C (AIX, Linux)    -qsmp=omp
          dnl   Cray CCE              -homp
          dnl   NEC SX                -Popenmp
          dnl   Lahey Fortran (Linux) --openmp
	  dnl   Classic flang          -mp, also -fopenmp
	  dnl If in this loop a compiler is passed an option that it doesn't
	  dnl understand or that it misinterprets, the AC_LINK_IFELSE test
	  dnl will fail (since we know that it failed without the option),
	  dnl therefore the loop will continue searching for an option, and
	  dnl no output file called 'penmp' or 'mp' is created.
	  dnl Sept 2017: Solaris needs -xopenmp tested before -fopenmp
	  for ac_option in -xopenmp -fiopenmp -fopenmp -qopenmp \
                           -openmp -mp -omp -qsmp=omp -homp \
			   -fopenmp=libomp \
                           -Popenmp --openmp; do
	    ac_save_[]_AC_LANG_PREFIX[]FLAGS=$[]_AC_LANG_PREFIX[]FLAGS

The R Project SVN R

(root)/trunk/m4/openmp.m4 @ 77458 – Rev 84711 → 84716

Rev 84711		Rev 84716
Line 30...		Line 30...
30		30
31	`# [a small part, modified for clang and Intel in 2015,6, Solaris in 2017.]`	31	`# [a small part, modified for clang and Intel in 2015,6, Solaris in 2017.]`
32	`# [Change for Intel preferring -fiopenmp and deprecating -fopenmp in 2023.]`	32	`# [Change for Intel preferring -fiopenmp and deprecating -fopenmp in 2023.]`
33		33
34	`# _AC_LANG_OPENMP is a language-dependent program defined in c.m4 in`	34	`# _AC_LANG_OPENMP is a language-dependent program defined in c.m4 in`
35	`# the autoconf library.`	35	`# the autoconf library. And this is a modification of its AC_OPENMP`
36		36
37	`# R_OPENMP`	37	`# R_OPENMP`
38	`# --------`	38	`# --------`
39	`# Check which options need to be passed to the C compiler to support OpenMP.`	39	`# Check which options need to be passed to the C compiler to support OpenMP.`
40	`# Set the OPENMP_CFLAGS / OPENMP_CXXFLAGS / OPENMP_FFLAGS variable to these`	40	`# Set the OPENMP_CFLAGS / OPENMP_CXXFLAGS / OPENMP_FFLAGS variable to these`
Line 55...		Line 55...
55	`[ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp],`	55	`[ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp],`
56	`[AC_LINK_IFELSE([_AC_LANG_OPENMP],`	56	`[AC_LINK_IFELSE([_AC_LANG_OPENMP],`
57	`[ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp='none needed'],`	57	`[ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp='none needed'],`
58	`[ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp='unsupported'`	58	`[ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp='unsupported'`
59	`dnl Try these flags:`	59	`dnl Try these flags:`
60	`dnl GCC >= 4.2, clang >= 3.8 -fopenmp`	60	`dnl GCC >= 4.2, clang >= 3.8, flang-new -fopenmp`
61	`dnl clang 3.7.x -fopenmp=libomp`	61	`dnl clang 3.7.x -fopenmp=libomp`
62	`dnl (-fopenmp is accepted but does not work)`	62	`dnl (-fopenmp was accepted but does not work)`
63	`dnl Oracle C, Fortran -xopenmp`	63	`dnl Oracle C, Fortran -xopenmp`
64	`dnl (also accepts -fopenmp as from 12.4, but does not work in 12.5)`	64	`dnl (also accepts -fopenmp as from 12.4, but does not work in 12.5)`
65	`dnl Intel C, Fortran -qopenmp`	65	`dnl 'Classic' Intel C, Fortran -qopenmp`
66	`dnl Intel -openmp (deprecated)`	66	`dnl Intel -openmp (deprecated)`
67	`dnl (https://software.intel.com/en-us/node/581863,`	67	`dnl (https://software.intel.com/en-us/node/581863,`
68	`dnl https://software.intel.com/en-us/node/525020)`	68	`dnl https://software.intel.com/en-us/node/525020)`
69	`dnl 2023 Intel: prefers -fiopenmp`	69	`dnl 2023 Intel: prefers -fiopenmp`
70	`dnl SGI C, PGI C -mp`	70	`dnl SGI C, PGI C -mp`
71	`dnl Tru64 Compaq C -omp`	71	`dnl Tru64 Compaq C -omp`
72	`dnl IBM C (AIX, Linux) -qsmp=omp`	72	`dnl IBM C (AIX, Linux) -qsmp=omp`
73	`dnl Cray CCE -homp`	73	`dnl Cray CCE -homp`
74	`dnl NEC SX -Popenmp`	74	`dnl NEC SX -Popenmp`
75	`dnl Lahey Fortran (Linux) --openmp`	75	`dnl Lahey Fortran (Linux) --openmp`
76	`dnl flang -mp, also -fopenmp`	76	`dnl Classic flang -mp, also -fopenmp`
77	`dnl If in this loop a compiler is passed an option that it doesn't`	77	`dnl If in this loop a compiler is passed an option that it doesn't`
78	`dnl understand or that it misinterprets, the AC_LINK_IFELSE test`	78	`dnl understand or that it misinterprets, the AC_LINK_IFELSE test`
79	`dnl will fail (since we know that it failed without the option),`	79	`dnl will fail (since we know that it failed without the option),`
80	`dnl therefore the loop will continue searching for an option, and`	80	`dnl therefore the loop will continue searching for an option, and`
81	`dnl no output file called 'penmp' or 'mp' is created.`	81	`dnl no output file called 'penmp' or 'mp' is created.`
82	`dnl Sept 2017: Solaris needs -xopenmp before -fopenmp`	82	`dnl Sept 2017: Solaris needs -xopenmp tested before -fopenmp`
83	`for ac_option in -xopenmp -fiopenmp -fopenmp -qopenmp \`	83	`for ac_option in -xopenmp -fiopenmp -fopenmp -qopenmp \`
84	`-openmp -mp -omp -qsmp=omp -homp \`	84	`-openmp -mp -omp -qsmp=omp -homp \`
85	`-fopenmp=libomp \`	85	`-fopenmp=libomp \`
86	`-Popenmp --openmp; do`	86	`-Popenmp --openmp; do`
87	`ac_save_[]_AC_LANG_PREFIX[]FLAGS=$[]_AC_LANG_PREFIX[]FLAGS`	87	`ac_save_[]_AC_LANG_PREFIX[]FLAGS=$[]_AC_LANG_PREFIX[]FLAGS`