main/python2: set thread stack size to 1 MiB

We need increase stack size so we dont segfautl before we hit the
recursion limit.

main/python2/APKBUILD

@@ -4,7 +4,7 @@ pkgname=python2
 # the python2-tkinter's pkgver needs to be synchronized with this.
 pkgver=2.7.14
 _verbase=${pkgver%.*}
-pkgrel=1
+pkgrel=2
 pkgdesc="A high-level scripting language"
 url="http://www.python.org"
 arch="all"
@@ -36,7 +36,7 @@ prepare() {
 
 build() {
 	cd "$builddir"
-	export OPT="$CFLAGS"
+	export OPT="$CFLAGS -DTHREAD_STACK_SIZE=0x100000"
 	./configure \
 		--build=$CBUILD \
 		--host=$CHOST \
@@ -51,6 +51,26 @@ build() {
 	make
 }
 
+check() {
+	cd "$builddir"
+
+	# test that we reach recursionlimit before we segfault
+	cat > test-stacksize.py <<-EOF
+	import threading
+	import sys
+
+	def fun(i):
+	  try:
+	    fun(i+1)
+	  except:
+	    sys.exit(0)
+
+	t = threading.Thread(target=fun, args=[1])
+	t.start()
+EOF
+	LD_LIBRARY_PATH=$PWD ./python test-stacksize.py
+}
+
 package() {
 	cd "$builddir"
 	make -j1 DESTDIR="$pkgdir" install