[dev-db/mongodb] WIP stuff, builds for the most part

dev-db/mongodb/files/mongodb-7.0.1-sconstruct.patch

@@ -0,0 +1,110 @@
+wrt PATH:
+"""
+https://jira.mongodb.org/browse/SERVER-94430 Upstream respond:
+
+> we intentionally do not ingest the environment PATH as this makes build
+> reproducibility and hermiticity much harder. Instead, you should set the
+> absolute paths to the tools you want to use on the command line, instead of
+> relying on the PATH.
+
+Gentoo bug https://bugs.gentoo.org/829340
+
+In Gentoo, we have LLVM slotted and we put clang in /usr/lib/llvm/18/bin (or
+whatever), not in /usr/bin, and if upstream strip PATH and construct it
+themselves, they surely won't contain this location.
+
+So we add PATH backup for scons.
+"""
+diff --git a/SConstruct b/SConstruct
+index 2ebeb0e..44ce93a 100644
+--- a/SConstruct
++++ b/SConstruct
+@@ -3034,7 +3026,6 @@ if env.TargetOSIs('posix'):
+     env.Append(
+         CCFLAGS=[
+             "-fasynchronous-unwind-tables",
+-            "-g2" if not env.TargetOSIs('emscripten') else "-g",
+             "-Wall",
+             "-Wsign-compare",
+             "-Wno-unknown-pragmas",
+@@ -3101,6 +3092,8 @@ if env.TargetOSIs('posix'):
+ 
+     # env.Append( " -Wconversion" ) TODO: this doesn't really work yet
+     env.Append(CXXFLAGS=["-Woverloaded-virtual"])
++    env.Append(CXXFLAGS=os.environ['CXXFLAGS'])
++    env.Append(LINKFLAGS=os.environ['LDFLAGS'])
+ 
+     # On OS X, clang doesn't want the pthread flag at link time, or it
+     # issues warnings which make it impossible for us to declare link
+@@ -3151,7 +3144,7 @@ if env.TargetOSIs('posix'):
+         ], )
+ 
+     #make scons colorgcc friendly
+-    for key in ('HOME', 'TERM'):
++    for key in ('HOME', 'TERM', 'PATH'):
+         try:
+             env['ENV'][key] = os.environ[key]
+         except KeyError:
+@@ -3553,33 +3546,6 @@ def doConfigure(myenv):
+         myenv.AddMethod(
+             functools.partial(var_func, var=var, func=CheckFlag), f"Check{var}Supported")
+ 
+-    if myenv.ToolchainIs('gcc', 'clang'):
+-        # This tells clang/gcc to use the gold linker if it is available - we prefer the gold linker
+-        # because it is much faster. Don't use it if the user has already configured another linker
+-        # selection manually.
+-        if any(flag.startswith('-fuse-ld=') for flag in env['LINKFLAGS']):
+-            myenv.FatalError(
+-                f"Use the '--linker' option instead of modifying the LINKFLAGS directly.")
+-
+-        linker_ld = get_option('linker')
+-        if linker_ld == 'auto':
+-            if not env.TargetOSIs('darwin', 'macOS'):
+-                if not myenv.AddToLINKFLAGSIfSupported('-fuse-ld=lld'):
+-                    myenv.FatalError(
+-                        f"The recommended linker 'lld' is not supported with the current compiler configuration, you can try the 'gold' linker with '--linker=gold'."
+-                    )
+-        elif link_model.startswith("dynamic") and linker_ld == 'bfd':
+-            # BFD is not supported due to issues with it causing warnings from some of
+-            # the third party libraries that mongodb is linked with:
+-            # https://jira.mongodb.org/browse/SERVER-49465
+-            myenv.FatalError(f"Linker {linker_ld} is not supported with dynamic link model builds.")
+-        else:
+-            if not myenv.AddToLINKFLAGSIfSupported(f'-fuse-ld={linker_ld}'):
+-                myenv.FatalError(f"Linker {linker_ld} could not be configured.")
+-
+-        if has_option('gcov') and myenv.AddToCCFLAGSIfSupported('-fprofile-update=single'):
+-            myenv.AppendUnique(LINKFLAGS=['-fprofile-update=single'])
+-
+     detectCompiler = Configure(
+         myenv,
+         help=False,
+@@ -5119,17 +5085,13 @@ def doConfigure(myenv):
+         "BOOST_LOG_NO_SHORTHAND_NAMES",
+         "BOOST_LOG_USE_NATIVE_SYSLOG",
+         "BOOST_LOG_WITHOUT_THREAD_ATTR",
++        "BOOST_LOG_DYN_LINK",
+         "BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS",
+         "BOOST_SYSTEM_NO_DEPRECATED",
+         "BOOST_THREAD_USES_DATETIME",
+         ("BOOST_THREAD_VERSION", "5"),
+     ])
+ 
+-    if link_model.startswith("dynamic") and not link_model == 'dynamic-sdk':
+-        conf.env.AppendUnique(CPPDEFINES=[
+-            "BOOST_LOG_DYN_LINK",
+-        ])
+-
+     if use_system_version_of_library("boost"):
+         if not conf.CheckCXXHeader("boost/filesystem/operations.hpp"):
+             myenv.ConfError("can't find boost headers")
+@@ -5326,6 +5288,9 @@ def doConfigure(myenv):
+ 
+     mongoc_mode = get_option('use-system-mongo-c')
+     conf.env['MONGO_HAVE_LIBMONGOC'] = False
++    conf.env.ParseConfig('pkg-config libbson-1.0 libmongoc-1.0 --cflags')
++    conf.env['LIBDEPS_LIBBSON_SYSLIBDEP'] = 'bson-1.0'
++
+     if mongoc_mode != 'off':
+         if conf.CheckLibWithHeader(
+             ["mongoc-1.0"],