Error: SDK "macosx" cannot be located. Is the OSX not supported?

[romario89]

Sorry for posting 3rd issue in a row. Now I get this error when I try to make -j8 ppc.
My setup is: OSX 10.5.8 PPC, Python 2.7.6, GCC 4.2.1, svn 1.7.14

PYTHONPATH="/Users/haansgruber/Downloads/v8ppc-    master/tools/generate_shim_headers:" \
    GYP_GENERATORS=make \
    build/gyp/gyp --generator-output="out" build/all.gyp \
                  -Ibuild/standalone.gypi --depth=. \
                  -Dv8_target_arch=ppc \
                  -S.ppc  -Dv8_enable_backtrace=1 -Darm_fpu=default -    Darm_float_abi=default

xcodebuild: Warning: SDK "macosx" cannot be located.  Using project-defined SDK.

Error: A valid SDK was not specified on the command line for -sdk when used with -    version.

gyp: Error 1 running xcodebuild
make: *** [out/Makefile.ppc] Error 1

It is said that recent versions of (Intel) node.js cannot be compiled on OSX 10.5.x (ref: nodejs/node-v0.x-archive#6571) I noticed there were only Linux and AIX builds of v8ppc at the CI page of v8ppc.

Could the SDK "macosx" error I got and the absence of OSX builds in the CI repository of v8ppc all mean that v8ppc cannot be built on OSX?

[romario89]

It looks like v8ppc is not targeted at OSX (link https://groups.google.com/forum/#!topic/nodejs/ivGMr-C_m1Y)

Can we add this "(for the time being) only Linux PPC and AIX are supported" to the title?

[andrewlow]

I'm happy to leave this one open - it's a legitimate issue.

There is one against the node repo we have here ibmruntimes/node#14 and it is basically the same problem.

Today, no one has done the work to support OSX with the PPC code. If you're running Linux on a G5 then things work.

This is something that probably just needs a little effort to sort out the GYP files etc. Much easier than dealing with the assembly stuff.

[barracuda156]

Request to developers: Please make it build on PowerPC MacOS.

[barracuda156]

I'm happy to leave this one open - it's a legitimate issue.

There is one against the node repo we have here ibmruntimes/node#14 and it is basically the same problem.

Today, no one has done the work to support OSX with the PPC code. If you're running Linux on a G5 then things work.

This is something that probably just needs a little effort to sort out the GYP files etc. Much easier than dealing with the assembly stuff.

@andrewlow Fixing gyp files is quite easy. However Darwin ABI differs from ELF and AIX, so the code and likely assembler will need extra work.

Something like:

--- a/configure.py	2022-09-02 00:58:51.000000000 +0700
+++ b/configure.py	2022-09-02 01:54:31.000000000 +0700
@@ -952,7 +952,9 @@
     '__MIPSEL__'  : 'mipsel',
     '__mips__'    : 'mips',
     '__PPC64__'   : 'ppc64',
-    '__PPC__'     : 'ppc64',
+    '__ppc64__'   : 'ppc64',
+    '__PPC__'     : 'ppc',
+    '__ppc__'     : 'ppc',
     '__x86_64__'  : 'x64',
     '__s390x__'   : 's390x',
   }

--- a/common.gypi	2022-09-02 00:58:56.000000000 +0700
+++ b/common.gypi	2022-09-02 05:17:01.000000000 +0700
@@ -132,7 +132,7 @@
       }, {
         'openssl_product': '<(STATIC_LIB_PREFIX)openssl<(STATIC_LIB_SUFFIX)',
       }],
-      ['OS=="mac"', {
+      ['OS=="mac" and target_arch!="ppc" and target_arch!="ppc64"', {
         'clang%': 1,
       }],
       ['target_arch in "ppc64 s390x"', {
@@ -500,6 +500,12 @@
           ['target_arch=="x64"', {
             'xcode_settings': {'ARCHS': ['x86_64']},
           }],
+          ['target_arch=="ppc"', {
+            'xcode_settings': {'ARCHS': ['ppc']},
+          }],
+          ['target_arch=="ppc64"', {
+            'xcode_settings': {'ARCHS': ['ppc64']},
+          }],
           ['target_arch=="arm64"', {
             'xcode_settings': {
               'ARCHS': ['arm64'],

--- a/tools/v8_gypfiles/toolchain.gypi	2022-09-02 00:58:59.000000000 +0700
+++ b/tools/v8_gypfiles/toolchain.gypi	2022-09-02 03:34:18.000000000 +0700
@@ -295,10 +295,21 @@
           'V8_TARGET_ARCH_PPC',
         ],
         'conditions': [
+          ['v8_target_arch=="ppc"', {
+            'defines': [
+              'V8_TARGET_ARCH_32_BIT',
+            ],
+            'xcode_settings': {
+              'ARCHS': [ 'ppc' ],
+            },
+          }],
           ['v8_target_arch=="ppc64"', {
             'defines': [
               'V8_TARGET_ARCH_PPC64',
             ],
+            'xcode_settings': {
+              'ARCHS': [ 'ppc64' ],
+            },
           }],
           ['v8_host_byteorder=="little"', {
             'defines': [
@@ -1011,7 +1022,7 @@
               }],
             ],
             'xcode_settings': {
-              'ARCHS': [ 'i386' ],
+              'ARCHS': [ 'ppc' ],
             },
           }],
           ['_toolset=="target"', {
@@ -1029,12 +1040,12 @@
               }],
             ],
             'xcode_settings': {
-              'ARCHS': [ 'i386' ],
+              'ARCHS': [ 'ppc' ],
             },
           }],
         ],
       }],
-      ['(OS=="linux" or OS=="android") and \
+      ['(OS=="linux" or OS=="mac" or OS=="android") and \
         (v8_target_arch=="x64" or v8_target_arch=="arm64" or \
          v8_target_arch=="ppc64" or v8_target_arch=="s390x")', {
         'target_conditions': [
@@ -1045,6 +1056,9 @@
                 'ldflags': [ '-m64' ]
               }],
              ],
+            'xcode_settings': {
+              'ARCHS': [ 'ppc64' ],
+            },
            }],
           ['_toolset=="target"', {
              'conditions': [
@@ -1052,7 +1066,10 @@
                  'cflags': [ '-m64' ],
                  'ldflags': [ '-m64' ],
                }],
-             ]
+             ],
+            'xcode_settings': {
+              'ARCHS': [ 'ppc64' ],
+            },
            }],
          ],
       }],


--- a/tools/gyp/pylib/gyp/xcode_emulation.py	2022-09-02 00:58:55.000000000 +0700
+++ b/tools/gyp/pylib/gyp/xcode_emulation.py	2022-09-02 02:58:18.000000000 +0700
@@ -120,7 +120,13 @@
   if XCODE_ARCHS_DEFAULT_CACHE:
     return XCODE_ARCHS_DEFAULT_CACHE
   xcode_version, _ = XcodeVersion()
-  if xcode_version < '0500':
+  if xcode_version < '0400':
+    XCODE_ARCHS_DEFAULT_CACHE = XcodeArchsDefault(
+        '$(ARCHS_STANDARD)',
+        XcodeArchsVariableMapping(['ppc']),
+        XcodeArchsVariableMapping(['ppc64']),
+        XcodeArchsVariableMapping(['i386']))
+  elif xcode_version < '0500':
     XCODE_ARCHS_DEFAULT_CACHE = XcodeArchsDefault(
         '$(ARCHS_STANDARD)',
         XcodeArchsVariableMapping(['i386']),

--- a/deps/npm/node_modules/node-gyp/gyp/pylib/gyp/xcode_emulation.py	2022-09-02 00:58:52.000000000 +0700
+++ b/deps/npm/node_modules/node-gyp/gyp/pylib/gyp/xcode_emulation.py	2022-09-02 02:58:21.000000000 +0700
@@ -120,7 +120,13 @@
   if XCODE_ARCHS_DEFAULT_CACHE:
     return XCODE_ARCHS_DEFAULT_CACHE
   xcode_version, _ = XcodeVersion()
-  if xcode_version < '0500':
+  if xcode_version < '0400':
+    XCODE_ARCHS_DEFAULT_CACHE = XcodeArchsDefault(
+        '$(ARCHS_STANDARD)',
+        XcodeArchsVariableMapping(['ppc']),
+        XcodeArchsVariableMapping(['ppc64']),
+        XcodeArchsVariableMapping(['i386']))
+  elif xcode_version < '0500':
     XCODE_ARCHS_DEFAULT_CACHE = XcodeArchsDefault(
         '$(ARCHS_STANDARD)',
         XcodeArchsVariableMapping(['i386']),

[barracuda156]

@romario89 With patches from this branch v8 should build on macOS ppc: https://github.com/barracuda156/v8-ppc/tree/8.3-powerpc-darwin-new
Or just use the port, which has build system set up: macports/macports-ports@178ba29

Notice, this is only confirmed to build on PowerPC, and has experimental status. (x86_64 from the same port appears fully functional; aarch64 not so much, though it also builds.)

PowerPC-specific code is likely to have omissions and errors; use at your own risk.
(I am just leaving it here, since may forget do it later on.)

@andrewlow I really need help on one particular issue, if you get a time to look at it.