Build of python-pycurl with musl toolchain

The build took 00h 01m 18s and was NOT successful.

The program in this build is written in the following languages, according to sloccount:

SLOCLanguage
6,546 python
5,837 ansic
621 sh
144 makefile
53 php
13,201 total

The process tree of the build process is here.

List of Errors

Log

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Removed vanilla repositories from pacman.conf and added:
# [tuscan]
# Server = file:///var/cache/pacman/pkg/

CMD: pacman -Syy --noconfirm
# :: Synchronizing package databases...
# downloading tuscan.db...

There were existing files in /sysroot, using those
# /sysroot/lib
# /sysroot/share
# /sysroot/bin
# /sysroot/include
# /sysroot/libexec

CMD: sudo -u tuscan PATH=/sysroot/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin CC=clang CXX=clang++ red makepkg --noextract --syncdeps --skipinteg --skippgpcheck --skipchecksums --noconfirm --nocolor --log --noprogressbar --nocheck
# ==> Making package: python-pycurl 7.43.0-1 (Wed Apr 5 02:18:23 UTC 2017)
# ==> Checking runtime dependencies...
# ==> Checking buildtime dependencies...
# ==> WARNING: Using existing $srcdir/ tree
# ==> Starting build()...
# python setup.py docstrings
# python setup.py docstrings
# python setup.py build
# Using curl-config (libcurl 7.49.1)
# running build
# running build_py
# creating build
# creating build/lib.linux-x86_64-3.5
# creating build/lib.linux-x86_64-3.5/curl
# copying python/curl/__init__.py -> build/lib.linux-x86_64-3.5/curl
# running build_ext
# building 'pycurl' extension
# creating build/temp.linux-x86_64-3.5
# creating build/temp.linux-x86_64-3.5/src
# clang -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -DPYCURL_VERSION="7.43.0" -DHAVE_CURL_OPENSSL=1 -DHAVE_CURL_SSL=1 -I/usr/include/python3.5m -c src/docstrings.c -o build/temp.linux-x86_64-3.5/src/docstrings.o
# In file included from src/docstrings.c:4:
# src/pycurl.h:32:10: fatal error: 'curl/curl.h' file not found
 # #include
# ^
# 1 error generated.
# error: command 'clang' failed with exit status 1
# make: *** [Makefile:92: build] Error 1
# ==> ERROR: A failure occurred in build().
# Aborting...