[Tarantool-patches] [PATCH luajit] cmake: fix build for Alpine

[Sergey Kaplun]

Hi, Sergey!
Thanks for your comments!
Fixed them and force-pushed the branch.

On 13.12.24, Sergey Bronnikov wrote:
> Hello again, Sergey,
> 
> thanks for the patch!
> 
> LGTM with minor comments, see below
> 
> On 13.12.2024 15:59, Sergey Kaplun wrote:
> > Since Alpine uses musl [1] as its C standard library, the build for it
> s/musl/Musl/
> > failed after the commit af0f59da76292f30ff75be1ab01458d47b226995 ("test:
> > fix LuaJIT-tests for old libc version"), since `GetLibCVersion()` raises
> > an error. This patch adds the check of the ID in the /etc/os-release [2]
> > of the Linux distribution and avoids setting the GLibC version if the

Replaced typo: s/GLibC/glibc/.

> > distro is "alpine".
> >
> > [1]:https://wiki.alpinelinux.org/wiki/Musl
> > [2]:https://www.linux.org/docs/man5/os-release.html
> 
> There is also a documentation about os-release on Freedesktop [1].
> 
> I would add this link as well. Feel free to ignore.

Added, thanks!

> 
> 
> [1]: https://www.freedesktop.org/software/systemd/man/latest/os-release.html

The new commit message is the following:

| cmake: fix build for Alpine
|
| Since Alpine uses musl [1] as its C standard library, the build for it
| failed after the commit af0f59da76292f30ff75be1ab01458d47b226995 ("test:
| fix LuaJIT-tests for old libc version"), since `GetLibCVersion()` raises
| an error. This patch adds the check of the ID in the
| </etc/os-release> [2][3] of the Linux distribution and avoids setting
| the glibc version if the distro is "alpine".
|
| [1]: https://wiki.alpinelinux.org/wiki/Musl
| [2]: https://www.linux.org/docs/man5/os-release.html
| [3]: https://www.freedesktop.org/software/systemd/man/latest/os-release.html

> 
> > ---
> >
> > Branch:https://github.com/tarantool/luajit/tree/skaplun/gh-noticket-fix-alpine-build
> > PR for tests on master:https://github.com/tarantool/tarantool/pull/10824
> > Side note: build locally in Docker for test for Alpine.
> >

<snipped>

> > +if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
> > +  GetLinuxDistro(LINUX_DISTRO)
> > +  # Alpine uses musl instead of GLibC.
> 
> s/musl/Musl/

I've used as a reference (don't be confused by the links
themselfs) [1][2], looks like it should be "musl", after all.

[1]: https://wiki.alpinelinux.org/wiki/Musl
[2]: https://en.wikipedia.org/wiki/Musl

> 
> s/GLibC/glibc/ or s/GLibC/GNU C Library/, see [2].

Replaced with glibc.

===================================================================
diff --git a/test/LuaJIT-tests/CMakeLists.txt b/test/LuaJIT-tests/CMakeLists.txt
index adc630f0..c1dbde35 100644
--- a/test/LuaJIT-tests/CMakeLists.txt
+++ b/test/LuaJIT-tests/CMakeLists.txt
@@ -64,7 +64,7 @@ endif()
 
 if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
   GetLinuxDistro(LINUX_DISTRO)
-  # Alpine uses musl instead of GLibC.
+  # Alpine uses musl instead of glibc.
   if(NOT LINUX_DISTRO MATCHES "alpine")
     GetLibCVersion(LIBC_VERSION)
     # XXX: <tonumber_scan.lua> uses `strtod()`, old versions of
===================================================================

> 
> [2]: https://www.gnu.org/software/libc/
> 
> > +  if(NOT LINUX_DISTRO MATCHES "alpine")
> > +    GetLibCVersion(LIBC_VERSION)
> > +    # XXX: <tonumber_scan.lua> uses `strtod()`, old versions of
> > +    # which have the bug [1] for "0x1p-2075" parsing. Add the skip
> > +    # check for it.
> > +    # [1]:https://sourceware.org/bugzilla/show_bug.cgi?id=16151
> > +    list(APPEND LUAJIT_TEST_TAGS_EXTRA +libc=${LIBC_VERSION})
> > +  endif()
> >   endif()
> >   
> >   if(LUAJIT_ENABLE_TABLE_BUMP)
> > diff --git a/test/cmake/GetLinuxDistro.cmake b/test/cmake/GetLinuxDistro.cmake
> > new file mode 100644
> > index 00000000..027368be
> > --- /dev/null
> > +++ b/test/cmake/GetLinuxDistro.cmake
> > @@ -0,0 +1,18 @@
> > +# Determine the Linux distro id and return it in the `output`
> > +# variable. Seehttps://www.linux.org/docs/man5/os-release.html
> > +# for details.
> > +macro(GetLinuxDistro output)
> > +  if(NOT CMAKE_SYSTEM_NAME STREQUAL "Linux")
> > +    message(FATAL_ERROR "GetLinuxDistro macro must be used only on Linux")
> > +  endif()
> > +  file(READ /etc/os-release OS_RELEASE)
> 
> Fallback to /usr/lib/os-release as suggested in doc:
> 
>  > Applications should check for the former, and exclusively use its 
> data if it exists, and only fall back to /usr/lib/os-release if it is 
> missing.

Added the fallback:
===================================================================
diff --git a/test/cmake/GetLinuxDistro.cmake b/test/cmake/GetLinuxDistro.cmake
index 027368be..2636019c 100644
--- a/test/cmake/GetLinuxDistro.cmake
+++ b/test/cmake/GetLinuxDistro.cmake
@@ -5,13 +5,18 @@ macro(GetLinuxDistro output)
   if(NOT CMAKE_SYSTEM_NAME STREQUAL "Linux")
     message(FATAL_ERROR "GetLinuxDistro macro must be used only on Linux")
   endif()
-  file(READ /etc/os-release OS_RELEASE)
+  set(OS_RELEASE_FILE /etc/os-release)
+  if(NOT EXISTS ${OS_RELEASE_FILE})
+    set(OS_RELEASE_FILE /usr/lib/os-release)
+  endif()
+  file(READ ${OS_RELEASE_FILE} OS_RELEASE)
   string(REGEX MATCH "ID=([0-9a-z._-]+)" MATCH ${OS_RELEASE})
   if(MATCH)
     set(${output} ${CMAKE_MATCH_1})
   else()
     set(${output} linux)
   endif()
+  unset(OS_RELEASE_FILE)
   unset(OS_RELEASE)
   unset(MATCH)
   unset(CMAKE_MATCH_1)
===================================================================

> 
> > +  string(REGEX MATCH "ID=([0-9a-z._-]+)" MATCH ${OS_RELEASE})
> > +  if(MATCH)
> > +    set(${output} ${CMAKE_MATCH_1})
> > +  else()
> > +    set(${output} linux)
> > +  endif()
> > +  unset(OS_RELEASE)
> > +  unset(MATCH)
> > +  unset(CMAKE_MATCH_1)
> > +endmacro()

-- 
Best regards,
Sergey Kaplun