3 files changed, 56 insertions, 16 deletions
diff --git a/mesonbuild/modules/pkgconfig.py b/mesonbuild/modules/pkgconfig.py
index 79a4423..c85624c 100644
--- a/mesonbuild/modules/pkgconfig.py
+++ b/mesonbuild/modules/pkgconfig.py
@@ -31,6 +31,7 @@ class DependenciesHelper:
         self.priv_libs = []
         self.priv_reqs = []
         self.cflags = []
+        self.version_reqs = {}
 
     def add_pub_libs(self, libs):
         libs, reqs, cflags = self._process_libs(libs, True)
@@ -57,12 +58,17 @@ class DependenciesHelper:
                 processed_reqs.append(obj.generated_pc)
             elif hasattr(obj, 'pcdep'):
                 pcdeps = mesonlib.listify(obj.pcdep)
-                processed_reqs += [i.name for i in pcdeps]
+                for d in pcdeps:
+                    processed_reqs += d.name
+                    self.add_version_reqs(d.name, obj.version_reqs)
             elif isinstance(obj, dependencies.PkgConfigDependency):
                 if obj.found():
                     processed_reqs.append(obj.name)
+                    self.add_version_reqs(obj.name, obj.version_reqs)
             elif isinstance(obj, str):
-                processed_reqs.append(obj)
+                name, version_req = self.split_version_req(obj)
+                processed_reqs.append(name)
+                self.add_version_reqs(name, version_req)
             elif isinstance(obj, dependencies.Dependency) and not obj.found():
                 pass
             else:
@@ -83,12 +89,15 @@ class DependenciesHelper:
         for obj in libs:
             if hasattr(obj, 'pcdep'):
                 pcdeps = mesonlib.listify(obj.pcdep)
-                processed_reqs += [i.name for i in pcdeps]
+                for d in pcdeps:
+                    processed_reqs += d.name
+                    self.add_version_reqs(d.name, obj.version_reqs)
             elif hasattr(obj, 'generated_pc'):
                 processed_reqs.append(obj.generated_pc)
             elif isinstance(obj, dependencies.PkgConfigDependency):
                 if obj.found():
                     processed_reqs.append(obj.name)
+                    self.add_version_reqs(obj.name, obj.version_reqs)
             elif isinstance(obj, dependencies.ThreadDependency):
                 processed_libs += obj.get_compiler().thread_link_flags(obj.env)
                 processed_cflags += obj.get_compiler().thread_flags(obj.env)
@@ -123,6 +132,36 @@ class DependenciesHelper:
 
         return processed_libs, processed_reqs, processed_cflags
 
+    def add_version_reqs(self, name, version_reqs):
+        if version_reqs:
+            vreqs = self.version_reqs.get(name, [])
+            vreqs += mesonlib.stringlistify(version_reqs)
+            self.version_reqs[name] = vreqs
+
+    def split_version_req(self, s):
+        for op in ['>=', '<=', '!=', '==', '=', '>', '<']:
+            pos = s.find(op)
+            if pos > 0:
+                return s[0:pos].strip(), s[pos:].strip()
+        return s, None
+
+    def format_vreq(self, vreq):
+        # vreq are '>=1.0' and pkgconfig wants '>= 1.0'
+        for op in ['>=', '<=', '!=', '==', '=', '>', '<']:
+            if vreq.startswith(op):
+                return op + ' ' + vreq[len(op):]
+        return vreq
+
+    def format_reqs(self, reqs):
+        result = []
+        for name in reqs:
+            vreqs = self.version_reqs.get(name, None)
+            if vreqs:
+                result += [name + ' ' + self.format_vreq(vreq) for vreq in vreqs]
+            else:
+                result += [name]
+        return ', '.join(result)
+
     def remove_dups(self):
         def _fn(xs):
             # Remove duplicates whilst preserving original order
@@ -207,11 +246,12 @@ class PkgConfigModule(ExtensionModule):
             if len(url) > 0:
                 ofile.write('URL: %s\n' % url)
             ofile.write('Version: %s\n' % version)
-            if len(deps.pub_reqs) > 0:
-                ofile.write('Requires: {}\n'.format(' '.join(deps.pub_reqs)))
-            if len(deps.priv_reqs) > 0:
-                ofile.write(
-                    'Requires.private: {}\n'.format(' '.join(deps.priv_reqs)))
+            reqs_str = deps.format_reqs(deps.pub_reqs)
+            if len(reqs_str) > 0:
+                ofile.write('Requires: {}\n'.format(reqs_str))
+            reqs_str = deps.format_reqs(deps.priv_reqs)
+            if len(reqs_str) > 0:
+                ofile.write('Requires.private: {}\n'.format(reqs_str))
             if len(conflicts) > 0:
                 ofile.write('Conflicts: {}\n'.format(' '.join(conflicts)))
 
diff --git a/run_unittests.py b/run_unittests.py
index 94e39c8..0c84475 100755
--- a/run_unittests.py
+++ b/run_unittests.py
@@ -2266,11 +2266,11 @@ class LinuxlikeTests(BasePlatformTests):
         os.environ['PKG_CONFIG_LIBDIR'] = os.pathsep.join([privatedir1, privatedir2])
         cmd = ['pkg-config', 'dependency-test']
 
-        out = self._run(cmd + ['--print-requires']).strip().split()
+        out = self._run(cmd + ['--print-requires']).strip().split('\n')
         self.assertEqual(sorted(out), sorted(['libexposed']))
 
-        out = self._run(cmd + ['--print-requires-private']).strip().split()
-        self.assertEqual(sorted(out), sorted(['libfoo']))
+        out = self._run(cmd + ['--print-requires-private']).strip().split('\n')
+        self.assertEqual(sorted(out), sorted(['libfoo >= 1.0']))
 
         out = self._run(cmd + ['--cflags-only-other']).strip().split()
         self.assertEqual(sorted(out), sorted(['-pthread', '-DCUSTOM']))
@@ -2286,12 +2286,12 @@ class LinuxlikeTests(BasePlatformTests):
                                               '-lfoo']))
 
         cmd = ['pkg-config', 'requires-test']
-        out = self._run(cmd + ['--print-requires']).strip().split()
-        self.assertEqual(sorted(out), sorted(['libexposed', 'libfoo', 'libhello']))
+        out = self._run(cmd + ['--print-requires']).strip().split('\n')
+        self.assertEqual(sorted(out), sorted(['libexposed', 'libfoo >= 1.0', 'libhello']))
 
         cmd = ['pkg-config', 'requires-private-test']
-        out = self._run(cmd + ['--print-requires-private']).strip().split()
-        self.assertEqual(sorted(out), sorted(['libexposed', 'libfoo', 'libhello']))
+        out = self._run(cmd + ['--print-requires-private']).strip().split('\n')
+        self.assertEqual(sorted(out), sorted(['libexposed', 'libfoo >= 1.0', 'libhello']))
 
     def test_pkg_unfound(self):
         testdir = os.path.join(self.unit_test_dir, '22 unfound pkgconfig')
diff --git a/test cases/common/51 pkgconfig-gen/dependencies/meson.build b/test cases/common/51 pkgconfig-gen/dependencies/meson.build
index 2e00943..822a7b7 100644
--- a/test cases/common/51 pkgconfig-gen/dependencies/meson.build
+++ b/test cases/common/51 pkgconfig-gen/dependencies/meson.build
@@ -14,7 +14,7 @@ pkgg.generate(libraries : exposed_lib,
 )
 
 # Declare a few different Dependency objects
-pc_dep = dependency('libfoo')
+pc_dep = dependency('libfoo', version : '>=1.0')
 notfound_dep = dependency('notfound', required : false)
 threads_dep = dependency('threads')
 custom_dep = declare_dependency(link_args : ['-lcustom'], compile_args : ['-DCUSTOM'])