dev-python/cymem: fix flags

Closes: https://bugs.gentoo.org/887653
Signed-off-by: Anna (cybertailor) Vyalkova <cyber+gentoo@sysrq.in>

dev-python/cymem/cymem-2.0.7.ebuild

@@ -20,6 +20,8 @@ KEYWORDS="~amd64 ~x86"
 
 BDEPEND="dev-python/cython[${PYTHON_USEDEP}]"
 
+PATCHES=( "${FILESDIR}"/cymem-2.0.7-flags.patch )
+
 distutils_enable_tests pytest
 
 python_test() {

dev-python/cymem/files/cymem-2.0.7-flags.patch

@@ -0,0 +1,13 @@
+Don't overwrite user optimizations
+
+--- a/setup.py
++++ b/setup.py
+@@ -18,7 +18,7 @@ MOD_NAMES = ["cymem.cymem"]
+ # http://stackoverflow.com/questions/724664/python-distutils-how-to-get-a-compiler-that-is-going-to-be-used
+ compile_options = {
+     "msvc": ["/Ox", "/EHsc"],
+-    "other": ["-O3", "-Wno-strict-prototypes", "-Wno-unused-function"],
++    "other": ["-Wno-strict-prototypes", "-Wno-unused-function"],
+ }
+ link_options = {"msvc": [], "other": []}
+