[MacPorts] #67147: maxima-devel @ 5.46-dev-20221029_5 +xmaxima: Git clone failed - certificate has expired

[MacPorts]

#67147: maxima-devel @ 5.46-dev-20221029_5 +xmaxima: Git clone failed - certificate
has expired
------------------------------+--------------------
  Reporter:  dotnetCarpenter  |      Owner:  (none)
      Type:  defect           |     Status:  new
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.8.1
Resolution:                   |   Keywords:
      Port:  maxima-devel     |
------------------------------+--------------------

Comment (by tomio-arisaka):

 Replying to [comment:11 dotnetCarpenter]:

 > I haven't tried your patch but I can test it, if you want?

 You don't need to apply my patch if you don't like to do.
 Because it has already been verified on macOS High Sierra.

 Anyway, **maxima-devel** is provided to try to use a current development
 version of Maxima.
 Now, over 1800 commits are applied to the development version of Maxima
 after Maxima 5.46.0.

 \\
 > 1. `__builtin_cpu_init` is only an issue on the
 [https://build.macports.org/builders/ports-10.13_x86_64-builder/ buildbot]
 and not on my machine, where  ​[https://ports.macports.org/port/sbcl/
 sbcl] does build successfully.

 The issue depends on the version of Apple clang.
 So the resolution is to use a suitable version of clang or GCC in order to
 compile **SBCL**.

 [https://sourceforge.net/p/sbcl/sbcl/ci/master/tree/tools-for-build/avx2.c
 avx2.c] is a file copied from **SBCL**.
 This is to check **AVX2** instruction set of x86_64.

 {{{
 $ cat ./avx2.c
 int main () {
   __builtin_cpu_init();
   return __builtin_cpu_supports("avx2") != 0;
 }
 }}}

 {{{__builtin_cpu_init}}} and {{{__builtin_cpu_supports}}} are built-in
 functions of GCC and clang.
 But they are not available on the earlier versions of Apple clang
 (included in **Xcode 9.4.1** and earlier)

 {{{
 $ xcodebuild -version
 Xcode 9.4.1
 Build version 9F2000
 $
 $ clang --version
 Apple LLVM version 9.1.0 (clang-902.0.39.2)
 Target: x86_64-apple-darwin17.7.0
 Thread model: posix
 InstalledDir:
 /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
 $
 $ clang ./avx2.c -o ./avx2
 ./avx2.c:2:3: error: use of unknown builtin '__builtin_cpu_init'
       [-Wimplicit-function-declaration]
   __builtin_cpu_init();
   ^
 1 error generated.
 $
 $ /Library/Developer/CommandLineTools/usr/bin/clang --version
 Apple LLVM version 10.0.0 (clang-1000.10.44.4)
 Target: x86_64-apple-darwin17.7.0
 Thread model: posix
 InstalledDir: /Library/Developer/CommandLineTools/usr/bin
 $
 $ /Library/Developer/CommandLineTools/usr/bin/clang ./avx2.c -o ./avx2
 $
 $ echo $?
 0
 $
 }}}

 MacPorts clang also has {{{__builtin_cpu_init}}} and
 {{{__builtin_cpu_supports}}}:

 {{{
 $ port installed 'clang*'
 The following ports are currently installed:
   clang-14 @14.0.6_0+analyzer+libstdcxx (active)
   clang-15 @15.0.7_1+analyzer+libstdcxx (active)
   clang_select @2.2_1 (active)
 $
 $ clang-mp-15 --version
 clang version 15.0.7
 Target: x86_64-apple-darwin17.7.0
 Thread model: posix
 InstalledDir: /opt/local/libexec/llvm-15/bin
 $
 $ clang-mp-15 ./avx2.c -o ./avx2
 $
 $ echo $?
 0
 $
 $ ls -lt ./avx2.c ./avx2
 -rwxr-xr-x  1 manami  staff  8464  4  2 07:47 ./avx2
 -rw-r--r--  1 manami  staff    86 10 26 01:41 ./avx2.c
 $
 }}}

 So you can change the value of **CC** referred to the port-file of
 **SBCL** in order to use **clang-mp-15** to compile **SBCL**.
 For example, next command works expectedly:

 {{{
 $ sudo port install sbcl configure.cc=/opt/local/bin/clang-mp-15
 }}}

 It seems that the port-file of **SBCL** should be modified to use MacPorts
 clang instead of Apple clang.
 Because **Xcode 10.1** is not available on the earlier versions of macOS
 than macOS High Sierra.(e.g. macOS Sierra, OSX El Capitan)

 \\

 By the way, since **SBCL 2.3.3**, upstream has changed how to check
 **AVX2** in order to avoid causing an error when compiling avx2.c. (AVX2
 is used in SB-SIMD module)

 An extract from the differences between **SBCL 2.3.2** and **SBCL 2.3.3**:

 {{{
 $ diff -u SBCL-2.3.2-git/sbcl-code/make-config.sh SBCL-2.3.3-git/sbcl-code
 /make-config.sh
 --- SBCL-2.3.2-git/sbcl-code/make-config.sh     2023-02-27
 13:48:26.000000000 +0900
 +++ SBCL-2.3.3-git/sbcl-code/make-config.sh     2023-03-29
 16:52:31.000000000 +0900
 ...
 ...
 @@ -655,8 +652,7 @@
    x86-64)
      printf ' :sb-simd-pack :sb-simd-pack-256 :avx2' >> $ltf # not
 mandatory

 -    $GNUMAKE -C tools-for-build avx2
 -    if tools-for-build/avx2; then
 +    if ! $GNUMAKE -C tools-for-build avx2 2> /dev/null || tools-for-
 build/avx2 ; then
         SBCL_CONTRIB_BLOCKLIST="$SBCL_CONTRIB_BLOCKLIST sb-simd"
      fi

 }}}

 The change shows that building **SBCL** does not stop if clang fails to
 compile avx2.c,
 and if so, **SB-SIMD** module is not built at the same time.
 So we should use a suitable version of clang or GCC in order to compile
 **SBCL**.

-- 
Ticket URL: <https://trac.macports.org/ticket/67147#comment:12>
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