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build: log detected compilers in --verbose mode
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Log the versions of the detected compilers when the configure script
is run with `--verbose` to help verify which compiler is being used if
multiple toolchains are installed on the system.

Signed-off-by: Richard Lau <[email protected]>

PR-URL: #32715
Reviewed-By: Gireesh Punathil <[email protected]>
Reviewed-By: Rod Vagg <[email protected]>
Reviewed-By: Sam Roberts <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
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richardlau authored and targos committed Apr 11, 2020
1 parent 3907de7 commit a11e3ef
Showing 1 changed file with 8 additions and 2 deletions.
10 changes: 8 additions & 2 deletions configure.py
Original file line number Diff line number Diff line change
Expand Up @@ -826,21 +826,27 @@ def check_compiler(o):
return

ok, is_clang, clang_version, gcc_version = try_check_compiler(CXX, 'c++')
version_str = ".".join(map(str, clang_version if is_clang else gcc_version))
print_verbose('Detected %sC++ compiler (CXX=%s) version: %s' %
('clang ' if is_clang else '', CXX, version_str))
if not ok:
warn('failed to autodetect C++ compiler version (CXX=%s)' % CXX)
elif clang_version < (8, 0, 0) if is_clang else gcc_version < (6, 3, 0):
warn('C++ compiler (CXX=%s, %s) too old, need g++ 6.3.0 or clang++ 8.0.0' %
(CXX, ".".join(map(str, clang_version if is_clang else gcc_version))))
(CXX, version_str))

ok, is_clang, clang_version, gcc_version = try_check_compiler(CC, 'c')
version_str = ".".join(map(str, clang_version if is_clang else gcc_version))
print_verbose('Detected %sC compiler (CC=%s) version: %s' %
('clang ' if is_clang else '', CC, version_str))
if not ok:
warn('failed to autodetect C compiler version (CC=%s)' % CC)
elif not is_clang and gcc_version < (4, 2, 0):
# clang 3.2 is a little white lie because any clang version will probably
# do for the C bits. However, we might as well encourage people to upgrade
# to a version that is not completely ancient.
warn('C compiler (CC=%s, %s) too old, need gcc 4.2 or clang 3.2' %
(CC, ".".join(map(str, gcc_version))))
(CC, version_str))

o['variables']['llvm_version'] = get_llvm_version(CC) if is_clang else '0.0'

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