3 files changed, 38 insertions, 1 deletions
diff --git a/mesonbuild/dependencies/__init__.py b/mesonbuild/dependencies/__init__.py
index 4796980..1c67311 100644
--- a/mesonbuild/dependencies/__init__.py
+++ b/mesonbuild/dependencies/__init__.py
@@ -18,7 +18,7 @@ from .base import (  # noqa: F401
     ExternalDependency, ExternalLibrary, ExtraFrameworkDependency, InternalDependency,
     PkgConfigDependency, find_external_dependency, get_dep_identifier, packages, _packages_accept_language)
 from .dev import GMockDependency, GTestDependency, LLVMDependency, ValgrindDependency
-from .misc import (MPIDependency, Python3Dependency, ThreadDependency, PcapDependency, CupsDependency, LibWmfDependency)
+from .misc import (MPIDependency, OpenMPDependency, Python3Dependency, ThreadDependency, PcapDependency, CupsDependency, LibWmfDependency)
 from .platform import AppleFrameworks
 from .ui import GLDependency, GnuStepDependency, Qt4Dependency, Qt5Dependency, SDL2Dependency, WxDependency, VulkanDependency
 
@@ -33,6 +33,7 @@ packages.update({
     # From misc:
     'boost': BoostDependency,
     'mpi': MPIDependency,
+    'openmp': OpenMPDependency,
     'python3': Python3Dependency,
     'threads': ThreadDependency,
     'pcap': PcapDependency,
@@ -53,4 +54,5 @@ packages.update({
 })
 _packages_accept_language.update({
     'mpi',
+    'openmp',
 })
diff --git a/mesonbuild/dependencies/base.py b/mesonbuild/dependencies/base.py
index 4127081..2a19544 100644
--- a/mesonbuild/dependencies/base.py
+++ b/mesonbuild/dependencies/base.py
@@ -134,6 +134,9 @@ class Dependency:
     def get_exe_args(self, compiler):
         return []
 
+    def need_openmp(self):
+        return False
+
     def need_threads(self):
         return False
 
diff --git a/mesonbuild/dependencies/misc.py b/mesonbuild/dependencies/misc.py
index 2a218be..d4525b1 100644
--- a/mesonbuild/dependencies/misc.py
+++ b/mesonbuild/dependencies/misc.py
@@ -237,6 +237,38 @@ class MPIDependency(ExternalDependency):
                     [os.path.join(libdir, 'msmpi.lib')])
 
 
+class OpenMPDependency(ExternalDependency):
+    # Map date of specification release (which is the macro value) to a version.
+    VERSIONS = {
+        '201511': '4.5',
+        '201307': '4.0',
+        '201107': '3.1',
+        '200805': '3.0',
+        '200505': '2.5',
+        '200203': '2.0',
+        '199810': '1.0',
+    }
+
+    def __init__(self, environment, kwargs):
+        language = kwargs.get('language')
+        super().__init__('openmp', environment, language, kwargs)
+        self.is_found = False
+        openmp_date = self.compiler.get_define('_OPENMP', '', self.env, [], [self])
+        if openmp_date:
+            self.version = self.VERSIONS[openmp_date]
+            if self.compiler.has_header('omp.h', '', self.env, dependencies=[self]):
+                self.is_found = True
+            else:
+                mlog.log(mlog.yellow('WARNING:'), 'OpenMP found but omp.h missing.')
+        if self.is_found:
+            mlog.log('Dependency', mlog.bold(self.name), 'found:', mlog.green('YES'), self.version)
+        else:
+            mlog.log('Dependency', mlog.bold(self.name), 'found:', mlog.red('NO'))
+
+    def need_openmp(self):
+        return True
+
+
 class ThreadDependency(ExternalDependency):
     def __init__(self, environment, kwargs):
         super().__init__('threads', environment, None, {})