Archive shared library in AIX (#11850)

* Archive shared library in AIX

This code change to ensure we archive shared libraries in AIX.

The things we do are:
Archive shared library
Install archived shared library
Build all must build the archived shared library
blibpath must have the archived shared library dependency.

* Archive shared library in AIX.

Made changes as per the review comments given in the first
PR request.

They are:-
Use self.environment.machines[t.for_machine].is_aix()
Remove trial spaces
Use of val instead of internal
Changed comments wherever requested

* Space after octothorpe

* Fixed failed test case causing build break during install section

* Moved AIX specific code to AIXDynamicLinker from backend

* Fix indentation, trailing spaces, add type annotations and Linux/macOS build break

* Remove some more trailing space issues

* Fixed the wrong return type in linkers

5 files changed, 66 insertions, 1 deletions

diff --git a/mesonbuild/backend/ninjabackend.py b/mesonbuild/backend/ninjabackend.py
index b36e125..29cc8c6 100644
--- a/mesonbuild/backend/ninjabackend.py
+++ b/mesonbuild/backend/ninjabackend.py
@@ -1034,6 +1034,11 @@ class NinjaBackend(backends.Backend):
         elem = self.generate_link(target, outname, final_obj_list, linker, pch_objects, stdlib_args=stdlib_args)
         self.generate_dependency_scan_target(target, compiled_sources, source2object, generated_source_files, fortran_order_deps)
         self.add_build(elem)
+        #In AIX, we archive shared libraries. If the instance is a shared library, we add a command to archive the shared library
+        #object and create the build element.
+        if isinstance(target, build.SharedLibrary) and self.environment.machines[target.for_machine].is_aix():
+            elem = NinjaBuildElement(self.all_outputs, linker.get_archive_name(outname), 'AIX_LINKER', [outname])
+            self.add_build(elem)
 
     def should_use_dyndeps_for_target(self, target: 'build.BuildTarget') -> bool:
         if mesonlib.version_compare(self.ninja_version, '<1.10.0'):
@@ -2306,6 +2311,13 @@ class NinjaBackend(backends.Backend):
 
                 options = self._rsp_options(compiler)
                 self.add_rule(NinjaRule(rule, command, args, description, **options, extra=pool))
+            if self.environment.machines[for_machine].is_aix():
+                rule = 'AIX_LINKER{}'.format(self.get_rule_suffix(for_machine))
+                description = 'Archiving AIX shared library'
+                cmdlist = compiler.get_command_to_archive_shlib()
+                args = []
+                options = {}
+                self.add_rule(NinjaRule(rule, cmdlist, args, description, **options, extra=None))
 
         args = self.environment.get_build_command() + \
             ['--internal',
@@ -3378,6 +3390,11 @@ https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47485'''))
         else:
             dependencies = target.get_dependencies()
         internal = self.build_target_link_arguments(linker, dependencies)
+        #In AIX since shared libraries are archived the dependencies must
+        #depend on .a file with the .so and not directly on the .so file.
+        if self.environment.machines[target.for_machine].is_aix():
+            for i, val in enumerate(internal):
+                internal[i] = linker.get_archive_name(val)
         commands += internal
         # Only non-static built targets need link args and link dependencies
         if not isinstance(target, build.StaticLibrary):
@@ -3581,6 +3598,11 @@ https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47485'''))
             for t in deps.values():
                 # Add the first output of each target to the 'all' target so that
                 # they are all built
+                #Add archive file if shared library in AIX for build all.
+                if isinstance(t, build.SharedLibrary):
+                    if self.environment.machines[t.for_machine].is_aix():
+                        linker, stdlib_args = self.determine_linker_and_stdlib_args(t)
+                        t.get_outputs()[0] = linker.get_archive_name(t.get_outputs()[0])
                 targetlist.append(os.path.join(self.get_target_dir(t), t.get_outputs()[0]))
 
             elem = NinjaBuildElement(self.all_outputs, targ, 'phony', targetlist)
diff --git a/mesonbuild/compilers/compilers.py b/mesonbuild/compilers/compilers.py
index 3fd5896..b8f5132 100644
--- a/mesonbuild/compilers/compilers.py
+++ b/mesonbuild/compilers/compilers.py
@@ -938,6 +938,12 @@ class Compiler(HoldableObject, metaclass=abc.ABCMeta):
         return self.linker.build_rpath_args(
             env, build_dir, from_dir, rpath_paths, build_rpath, install_rpath)
 
+    def get_archive_name(self, filename: str) -> str:
+        return self.linker.get_archive_name(filename)
+
+    def get_command_to_archive_shlib(self) -> T.List[str]:
+        return self.linker.get_command_to_archive_shlib()
+
     def thread_flags(self, env: 'Environment') -> T.List[str]:
         return []
 
diff --git a/mesonbuild/envconfig.py b/mesonbuild/envconfig.py
index 1bf6ab9..24c1855 100644
--- a/mesonbuild/envconfig.py
+++ b/mesonbuild/envconfig.py
@@ -357,6 +357,12 @@ class MachineInfo(HoldableObject):
         """
         return self.system == 'gnu'
 
+    def is_aix(self) -> bool:
+        """
+        Machine is aix?
+        """
+        return self.system == 'aix'
+
     def is_irix(self) -> bool:
         """Machine is IRIX?"""
         return self.system.startswith('irix')
diff --git a/mesonbuild/linkers/linkers.py b/mesonbuild/linkers/linkers.py
index d7868f2..edd4085 100644
--- a/mesonbuild/linkers/linkers.py
+++ b/mesonbuild/linkers/linkers.py
@@ -16,6 +16,7 @@ from __future__ import annotations
 import abc
 import os
 import typing as T
+import re
 
 from .base import ArLikeLinker, RSPFileSyntax
 from .. import mesonlib
@@ -541,6 +542,14 @@ class DynamicLinker(metaclass=abc.ABCMeta):
                         suffix: str, soversion: str, darwin_versions: T.Tuple[str, str]) -> T.List[str]:
         return []
 
+    def get_archive_name(self, filename: str) -> str:
+        #Only used by AIX.
+        return str()
+
+    def get_command_to_archive_shlib(self) -> T.List[str]:
+        #Only used by AIX.
+        return []
+
 
 class PosixDynamicLinkerMixin:
 
@@ -1440,6 +1449,21 @@ class AIXDynamicLinker(PosixDynamicLinkerMixin, DynamicLinker):
     def get_allow_undefined_args(self) -> T.List[str]:
         return self._apply_prefix(['-berok'])
 
+    def get_archive_name(self, filename: str) -> str:
+        # In AIX we allow the shared library name to have the lt_version and so_version.
+        # But the archive name must just be .a .
+        # For Example shared object can have the name libgio.so.0.7200.1 but the archive
+        # must have the name libgio.a having libgio.a (libgio.so.0.7200.1) in the
+        # archive. This regular expression is to do the same.
+        filename = re.sub('[.][a]([.]?([0-9]+))*([.]?([a-z]+))*', '.a', filename.replace('.so', '.a'))
+        return filename
+
+    def get_command_to_archive_shlib(self) -> T.List[str]:
+        # Archive shared library object and remove the shared library object,
+        # since it already exists in the archive.
+        command = ['ar', '-q', '-v', '$out', '$in', '&&', 'rm', '-f', '$in']
+        return command
+
     def get_link_whole_for(self, args: T.List[str]) -> T.List[str]:
         # AIX's linker always links the whole archive: "The ld command
         # processes all input files in the same manner, whether they are
diff --git a/mesonbuild/minstall.py b/mesonbuild/minstall.py
index ec01fe7..4900691 100644
--- a/mesonbuild/minstall.py
+++ b/mesonbuild/minstall.py
@@ -23,11 +23,12 @@ import shutil
 import subprocess
 import sys
 import typing as T
+import re
 
 from . import build, coredata, environment
 from .backend.backends import InstallData
 from .mesonlib import (MesonException, Popen_safe, RealPathAction, is_windows,
-                       setup_vsenv, pickle_load, is_osx, OptionKey)
+                       is_aix, setup_vsenv, pickle_load, is_osx, OptionKey)
 from .scripts import depfixer, destdir_join
 from .scripts.meson_exe import run_exe
 try:
@@ -709,6 +710,12 @@ class Installer:
 
     def install_targets(self, d: InstallData, dm: DirMaker, destdir: str, fullprefix: str) -> None:
         for t in d.targets:
+            # In AIX, we archive our shared libraries.  When we install any package in AIX we need to
+            # install the archive in which the shared library exists. The below code does the same.
+            # We change the .so files having lt_version or so_version to archive file install.
+            if is_aix():
+                if '.so' in t.fname:
+                    t.fname = re.sub('[.][a]([.]?([0-9]+))*([.]?([a-z]+))*', '.a', t.fname.replace('.so', '.a'))
             if not self.should_install(t):
                 continue
             if not os.path.exists(t.fname):