mod_wsgiをインストールする時のエラーの対処法
エラーに遭遇
pip install mod_wsgiを実行すると，以下のようなエラーがでた
ERROR: Command errored out with exit status 1:
command: /home/ubuntu/.pyenv/versions/3.8.6/bin/python -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-jusx1yov/mod-wsgi/setup.py'"'"'; __file__='"'"'/tmp/pip-install-jusx1yov/mod-wsgi/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-8jy4kqod/install-record.txt --single-version-externally-managed --compile --install-headers /home/ubuntu/.pyenv/versions/3.8.6/include/python3.8/mod-wsgi
cwd: /tmp/pip-install-jusx1yov/mod-wsgi/
Complete output (66 lines):
WARNING: The Python installation you are using does not appear to have
been installed with a shared library, or in the case of MacOS X, as a
framework. Where these are not present, the compilation of mod_wsgi may
fail, or if it does succeed, will result in extra memory being used by
all processes at run time as a result of the static library needing to
be loaded in its entirety to every process. It is highly recommended
that you reinstall the Python installation being used from source code,
supplying the '--enable-shared' option to the 'configure' script when
configuring the source code prior to building and installing it.
/home/ubuntu/.pyenv/versions/3.8.6/lib/python3.8/distutils/dist.py:274: UserWarning: Unknown distribution option: 'bugtrack_url'
warnings.warn(msg)
running install
running build
running build_py
creating build
creating build/lib.linux-x86_64-3.8
creating build/lib.linux-x86_64-3.8/mod_wsgi
copying src/__init__.py -> build/lib.linux-x86_64-3.8/mod_wsgi
creating build/lib.linux-x86_64-3.8/mod_wsgi/server
copying src/server/apxs_config.py -> build/lib.linux-x86_64-3.8/mod_wsgi/server
copying src/server/environ.py -> build/lib.linux-x86_64-3.8/mod_wsgi/server
copying src/server/__init__.py -> build/lib.linux-x86_64-3.8/mod_wsgi/server
creating build/lib.linux-x86_64-3.8/mod_wsgi/server/management
copying src/server/management/__init__.py -> build/lib.linux-x86_64-3.8/mod_wsgi/server/management
creating build/lib.linux-x86_64-3.8/mod_wsgi/server/management/commands
copying src/server/management/commands/runmodwsgi.py -> build/lib.linux-x86_64-3.8/mod_wsgi/server/management/commands
copying src/server/management/commands/__init__.py -> build/lib.linux-x86_64-3.8/mod_wsgi/server/management/commands
creating build/lib.linux-x86_64-3.8/mod_wsgi/docs
copying docs/_build/html/__init__.py -> build/lib.linux-x86_64-3.8/mod_wsgi/docs
creating build/lib.linux-x86_64-3.8/mod_wsgi/images
copying images/__init__.py -> build/lib.linux-x86_64-3.8/mod_wsgi/images
copying images/snake-whiskey.jpg -> build/lib.linux-x86_64-3.8/mod_wsgi/images
running build_ext
building 'mod_wsgi.server.mod_wsgi-py38' extension
creating build/temp.linux-x86_64-3.8
creating build/temp.linux-x86_64-3.8/src
creating build/temp.linux-x86_64-3.8/src/server
gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/usr/include/apache2 -I/home/ubuntu/.pyenv/versions/3.8.6/include/python3.8 -c src/server/wsgi_daemon.c -o build/temp.linux-x86_64-3.8/src/server/wsgi_daemon.o -I/usr/include/apache2 -I. -I/usr/include/apr-1.0 -I/usr/include -Wdate-time -D_FORTIFY_SOURCE=2 -DLINUX -D_REENTRANT -D_GNU_SOURCE -pipe -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -pthread -I/usr/include/apr-1.0 -I/usr/include/apr-1.0 -I/usr/include
gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/usr/include/apache2 -I/home/ubuntu/.pyenv/versions/3.8.6/include/python3.8 -c src/server/wsgi_server.c -o build/temp.linux-x86_64-3.8/src/server/wsgi_server.o -I/usr/include/apache2 -I. -I/usr/include/apr-1.0 -I/usr/include -Wdate-time -D_FORTIFY_SOURCE=2 -DLINUX -D_REENTRANT -D_GNU_SOURCE -pipe -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -pthread -I/usr/include/apr-1.0 -I/usr/include/apr-1.0 -I/usr/include
gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/usr/include/apache2 -I/home/ubuntu/.pyenv/versions/3.8.6/include/python3.8 -c src/server/wsgi_metrics.c -o build/temp.linux-x86_64-3.8/src/server/wsgi_metrics.o -I/usr/include/apache2 -I. -I/usr/include/apr-1.0 -I/usr/include -Wdate-time -D_FORTIFY_SOURCE=2 -DLINUX -D_REENTRANT -D_GNU_SOURCE -pipe -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -pthread -I/usr/include/apr-1.0 -I/usr/include/apr-1.0 -I/usr/include
gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/usr/include/apache2 -I/home/ubuntu/.pyenv/versions/3.8.6/include/python3.8 -c src/server/wsgi_stream.c -o build/temp.linux-x86_64-3.8/src/server/wsgi_stream.o -I/usr/include/apache2 -I. -I/usr/include/apr-1.0 -I/usr/include -Wdate-time -D_FORTIFY_SOURCE=2 -DLINUX -D_REENTRANT -D_GNU_SOURCE -pipe -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -pthread -I/usr/include/apr-1.0 -I/usr/include/apr-1.0 -I/usr/include
gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/usr/include/apache2 -I/home/ubuntu/.pyenv/versions/3.8.6/include/python3.8 -c src/server/wsgi_apache.c -o build/temp.linux-x86_64-3.8/src/server/wsgi_apache.o -I/usr/include/apache2 -I. -I/usr/include/apr-1.0 -I/usr/include -Wdate-time -D_FORTIFY_SOURCE=2 -DLINUX -D_REENTRANT -D_GNU_SOURCE -pipe -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -pthread -I/usr/include/apr-1.0 -I/usr/include/apr-1.0 -I/usr/include
gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/usr/include/apache2 -I/home/ubuntu/.pyenv/versions/3.8.6/include/python3.8 -c src/server/wsgi_convert.c -o build/temp.linux-x86_64-3.8/src/server/wsgi_convert.o -I/usr/include/apache2 -I. -I/usr/include/apr-1.0 -I/usr/include -Wdate-time -D_FORTIFY_SOURCE=2 -DLINUX -D_REENTRANT -D_GNU_SOURCE -pipe -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -pthread -I/usr/include/apr-1.0 -I/usr/include/apr-1.0 -I/usr/include
gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/usr/include/apache2 -I/home/ubuntu/.pyenv/versions/3.8.6/include/python3.8 -c src/server/wsgi_logger.c -o build/temp.linux-x86_64-3.8/src/server/wsgi_logger.o -I/usr/include/apache2 -I. -I/usr/include/apr-1.0 -I/usr/include -Wdate-time -D_FORTIFY_SOURCE=2 -DLINUX -D_REENTRANT -D_GNU_SOURCE -pipe -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -pthread -I/usr/include/apr-1.0 -I/usr/include/apr-1.0 -I/usr/include
gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/usr/include/apache2 -I/home/ubuntu/.pyenv/versions/3.8.6/include/python3.8 -c src/server/wsgi_thread.c -o build/temp.linux-x86_64-3.8/src/server/wsgi_thread.o -I/usr/include/apache2 -I. -I/usr/include/apr-1.0 -I/usr/include -Wdate-time -D_FORTIFY_SOURCE=2 -DLINUX -D_REENTRANT -D_GNU_SOURCE -pipe -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -pthread -I/usr/include/apr-1.0 -I/usr/include/apr-1.0 -I/usr/include
gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/usr/include/apache2 -I/home/ubuntu/.pyenv/versions/3.8.6/include/python3.8 -c src/server/wsgi_interp.c -o build/temp.linux-x86_64-3.8/src/server/wsgi_interp.o -I/usr/include/apache2 -I. -I/usr/include/apr-1.0 -I/usr/include -Wdate-time -D_FORTIFY_SOURCE=2 -DLINUX -D_REENTRANT -D_GNU_SOURCE -pipe -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -pthread -I/usr/include/apr-1.0 -I/usr/include/apr-1.0 -I/usr/include
gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/usr/include/apache2 -I/home/ubuntu/.pyenv/versions/3.8.6/include/python3.8 -c src/server/mod_wsgi.c -o build/temp.linux-x86_64-3.8/src/server/mod_wsgi.o -I/usr/include/apache2 -I. -I/usr/include/apr-1.0 -I/usr/include -Wdate-time -D_FORTIFY_SOURCE=2 -DLINUX -D_REENTRANT -D_GNU_SOURCE -pipe -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -pthread -I/usr/include/apr-1.0 -I/usr/include/apr-1.0 -I/usr/include
src/server/mod_wsgi.c: In function ‘wsgi_socket_sendv’:
src/server/mod_wsgi.c:10966:44: warning: signed and unsigned type in conditional expression [-Wsign-compare]
(nvec < iov_max ? nvec : (int)iov_max));
^
src/server/mod_wsgi.c: In function ‘wsgi_scan_headers’:
src/server/mod_wsgi.c:11125:30: warning: signed and unsigned type in conditional expression [-Wsign-compare]
buflen = buffer ? buflen : sizeof(x);
^
gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/usr/include/apache2 -I/home/ubuntu/.pyenv/versions/3.8.6/include/python3.8 -c src/server/wsgi_memory.c -o build/temp.linux-x86_64-3.8/src/server/wsgi_memory.o -I/usr/include/apache2 -I. -I/usr/include/apr-1.0 -I/usr/include -Wdate-time -D_FORTIFY_SOURCE=2 -DLINUX -D_REENTRANT -D_GNU_SOURCE -pipe -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -pthread -I/usr/include/apr-1.0 -I/usr/include/apr-1.0 -I/usr/include
gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/usr/include/apache2 -I/home/ubuntu/.pyenv/versions/3.8.6/include/python3.8 -c src/server/wsgi_validate.c -o build/temp.linux-x86_64-3.8/src/server/wsgi_validate.o -I/usr/include/apache2 -I. -I/usr/include/apr-1.0 -I/usr/include -Wdate-time -D_FORTIFY_SOURCE=2 -DLINUX -D_REENTRANT -D_GNU_SOURCE -pipe -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -pthread -I/usr/include/apr-1.0 -I/usr/include/apr-1.0 -I/usr/include
gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/usr/include/apache2 -I/home/ubuntu/.pyenv/versions/3.8.6/include/python3.8 -c src/server/wsgi_restrict.c -o build/temp.linux-x86_64-3.8/src/server/wsgi_restrict.o -I/usr/include/apache2 -I. -I/usr/include/apr-1.0 -I/usr/include -Wdate-time -D_FORTIFY_SOURCE=2 -DLINUX -D_REENTRANT -D_GNU_SOURCE -pipe -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -pthread -I/usr/include/apr-1.0 -I/usr/include/apr-1.0 -I/usr/include
gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I/usr/include/apache2 -I/home/ubuntu/.pyenv/versions/3.8.6/include/python3.8 -c src/server/wsgi_buckets.c -o build/temp.linux-x86_64-3.8/src/server/wsgi_buckets.o -I/usr/include/apache2 -I. -I/usr/include/apr-1.0 -I/usr/include -Wdate-time -D_FORTIFY_SOURCE=2 -DLINUX -D_REENTRANT -D_GNU_SOURCE -pipe -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -pthread -I/usr/include/apr-1.0 -I/usr/include/apr-1.0 -I/usr/include
gcc -pthread -shared -L/home/linuxbrew/.linuxbrew/opt/readline/lib -L/home/ubuntu/.pyenv/versions/3.8.6/lib -L/home/linuxbrew/.linuxbrew/opt/readline/lib -L/home/ubuntu/.pyenv/versions/3.8.6/lib build/temp.linux-x86_64-3.8/src/server/wsgi_daemon.o build/temp.linux-x86_64-3.8/src/server/wsgi_server.o build/temp.linux-x86_64-3.8/src/server/wsgi_metrics.o build/temp.linux-x86_64-3.8/src/server/wsgi_stream.o build/temp.linux-x86_64-3.8/src/server/wsgi_apache.o build/temp.linux-x86_64-3.8/src/server/wsgi_convert.o build/temp.linux-x86_64-3.8/src/server/wsgi_logger.o build/temp.linux-x86_64-3.8/src/server/wsgi_thread.o build/temp.linux-x86_64-3.8/src/server/wsgi_interp.o build/temp.linux-x86_64-3.8/src/server/mod_wsgi.o build/temp.linux-x86_64-3.8/src/server/wsgi_memory.o build/temp.linux-x86_64-3.8/src/server/wsgi_validate.o build/temp.linux-x86_64-3.8/src/server/wsgi_restrict.o build/temp.linux-x86_64-3.8/src/server/wsgi_buckets.o -o build/lib.linux-x86_64-3.8/mod_wsgi/server/mod_wsgi-py38.cpython-38-x86_64-linux-gnu.so -L/home/ubuntu/.pyenv/versions/3.8.6/lib -L/home/ubuntu/.pyenv/versions/3.8.6/lib/python3.8/config -lpython3.8
/usr/bin/ld: /home/ubuntu/.pyenv/versions/3.8.6/lib/libpython3.8.a(_warnings.o): relocation R_X86_64_PC32 against symbol `_PyRuntime' can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: final link failed: Bad value
collect2: error: ld returned 1 exit status
error: command 'gcc' failed with exit status 1
----------------------------------------
ERROR: Command errored out with exit status 1: /home/ubuntu/.pyenv/versions/3.8.6/bin/python -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-jusx1yov/mod-wsgi/setup.py'"'"'; __file__='"'"'/tmp/pip-install-jusx1yov/mod-wsgi/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-8jy4kqod/install-record.txt --single-version-externally-managed --compile --install-headers /home/ubuntu/.pyenv/versions/3.8.6/include/python3.8/mod-wsgi Check the logs for full command output.
なんてことだ．こんなに長いエラーに遭遇するのは久々だ．
調べてみると，依存パッケージが足りていないというわけではなく，pyenvでインストールしたpythonが共有オブジェクトを共有していないことが原因のようだ．
対処法
pyenvでインストールしたpythonを削除．手順は過去記事を参考に
そして次にインストールする際は以下のコマンドでインストール（ここが大事）
env PYTHON_CONFIGURE_OPTS="--enable-shared" pyenv install 3.8.6 pyenv global 3.8.6
こうして，pip install mod_wsgiを実行すると難なくインストールが完了