[bug] meson doesn't use the compiler specified in profile

[xahon]

Environment Details (include every applicable attribute)

• Operating System+version: Linux 4.15.3-1-generic
• Compiler+version: Clang 9.0.1
• Conan version: 1.33.0
• Python version: 3.5.3

My profile:

[settings]
build_type=Debug
arch=x86_64
arch_build=x86_64
os=Linux
os_build=Linux
compiler=clang
compiler.version=9
compiler.libcxx=libc++

[env]
CC=clang-9
CXX=clang++-9

Steps to reproduce (Include if Applicable)

1. conan install glib/2.58.3@bincrafters/stable -pr profile_with_clang --build

Logs (Executed commands with output) (Include/Attach if Applicable)

The Meson build system
Version: 0.53.0
Source dir: /home/user/conan/glib/2.58.3/my/stable/build/37ffc1180646bccd34925cc993d4062477e4c510/source_subfolder
Build dir: /home/user/conan/glib/2.58.3/my/stable/build/37ffc1180646bccd34925cc993d4062477e4c510/build_subfolder
Build type: native build
Project name: glib
Project version: 2.58.3

meson.build:1:0: ERROR: Unknown compiler(s): [['clang-7']]
The follow exceptions were encountered:
Running "clang-7 --version" gave "[Errno 2] No such file or directory: 'clang-7'"

A full log can be found at /home/user/conan/glib/2.58.3/my/stable/build/37ffc1180646bccd34925cc993d4062477e4c510/build_subfolder/meson-logs/meson-log.txt
glib/2.58.3@my/stable: 
glib/2.58.3@my/stable: ERROR: Package '37ffc1180646bccd34925cc993d4062477e4c510' build failed
glib/2.58.3@my/stable: WARN: Build folder /home/user/conan/glib/2.58.3/my/stable/build/37ffc1180646bccd34925cc993d4062477e4c510
ERROR: glib/2.58.3@my/stable: Error in build() method, line 123
        meson = self._configure_meson()
while calling '_configure_meson', line 98
        build_folder=self._build_subfolder, defs=defs)
        ConanException: Error 1 while executing meson "/home/user/conan/glib/2.58.3/my/stable/build/37ffc1180646bccd34925cc993d4062477e4c510/source_subfolder" "/home/user/conan/glib/2.58.3/my/stable/build/37ffc1180646bccd34925cc993d4062477e4c510/build_subfolder" --backend=ninja -Dlibmount="True" -Dbindir="bin" -Ddefault_library="static" -Db_staticpic="true" -Dlibexecdir="bin" -Dlibdir="lib" -Dprefix="/home/user/conan/glib/2.58.3/my/stable/package/37ffc1180646bccd34925cc993d4062477e4c510" -Dselinux="True" -Dinternal_pcre="False" -Dsbindir="bin" -Dincludedir="include" --buildtype=debug

[xahon]

I also tried CC=clang-9 CXX=clang++-9 conan install ..., the same error

[xahon]

My current workaround:

pushd /usr/local/bin
sudo ln -s /usr/bin/clang-9 clang-7
sudo ln -s /usr/bin/clang++-9 clang++-7
popd

[solvingj]

ping @SSE4 please have a look

[SSE4]

probably, the same issue as #8311

[solvingj]

@SSE4 it seems so.

@xahon is it ok with you if we close this as duplicate.