dev-python/pycurl: Respect CC/*FLAGS in fake-curl

Bug: https://bugs.gentoo.org/721270
Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/pycurl/files/pycurl-7.43.0.5-cc-cflags.patch

@@ -0,0 +1,34 @@
+From 861ba3143001caf2623ce5d84a1d04a69b502339 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Micha=C5=82=20G=C3=B3rny?= <mgorny@gentoo.org>
+Date: Mon, 11 May 2020 08:52:04 +0200
+Subject: [PATCH 1/2] Support overriding CC, respect *FLAGS in fake-curl
+
+The shipped libraries (obviously) do not work on non-amd64 platforms,
+and rebuilding without the correct compiler and flags does not work
+on more complex setups such as ppc64 with 32-bit userland.  Make
+the Makefile permit CC override while preserving the current default,
+and use user-provided CFLAGS, CPPFLAGS and LDFLAGS.
+---
+ tests/fake-curl/libcurl/Makefile | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/tests/fake-curl/libcurl/Makefile b/tests/fake-curl/libcurl/Makefile
+index b05bc89..8ece206 100644
+--- a/tests/fake-curl/libcurl/Makefile
++++ b/tests/fake-curl/libcurl/Makefile
+@@ -7,8 +7,11 @@ all: \
+ 
+ .SUFFIXES: .c .so
+ 
++CC = `curl-config --cc`
++CFLAGS += `curl-config --cflags`
++
+ .c.so:
+-	`curl-config --cc` `curl-config --cflags` -shared -fPIC \
++	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -shared -fPIC \
+ 		-Wl,-soname,$@ -o $@ $<
+ 
+ show-targets:
+-- 
+2.26.2
+

dev-python/pycurl/pycurl-7.43.0.5.ebuild

@@ -6,7 +6,7 @@ EAPI=7
 # The selftests fail with pypy, and urlgrabber segfaults for me.
 PYTHON_COMPAT=( python2_7 python3_{6,7,8} )
 
-inherit distutils-r1
+inherit distutils-r1 toolchain-funcs
 
 DESCRIPTION="python binding for curl/libcurl"
 HOMEPAGE="
@@ -51,6 +51,7 @@ DISTUTILS_IN_SOURCE_BUILD=1
 
 PATCHES=(
 	"${FILESDIR}"/pycurl-7.43.0.5-telnet-test.patch
+	"${FILESDIR}"/pycurl-7.43.0.5-cc-cflags.patch
 )
 
 python_prepare_all() {
@@ -66,7 +67,7 @@ python_configure_all() {
 src_test() {
 	# upstream bundles precompiled amd64 libs
 	rm tests/fake-curl/libcurl/*.so || die
-	emake -C tests/fake-curl/libcurl
+	emake -C tests/fake-curl/libcurl CC="$(tc-getCC)"
 
 	distutils-r1_src_test
 }