configure: use cffi.FFI().verify() to test buildability of CFFI bindings

[notmuch] / configure

diff --git a/configure b/configure
index 32a836bbdb7bcfb9fdc4ffb535d5df2dddfac767..05ade05b5adaa9cfaa9023afec5e4c8e2da50de5 100755 (executable)
--- a/configure
+++ b/configure
@@ -713,25 +713,26 @@ fi
 
 have_python3=0
 if [ $have_python -eq 1 ]; then
-    printf "Checking for python3..."
-    if "$python" -c 'import sys; assert sys.version_info >= (3,0)' > /dev/null 2>&1; then
+    printf "Checking for python3 (>= 3.5)..."
+    if "$python" -c 'import sys, sysconfig; assert sys.version_info >= (3,5)'; >/dev/null 2>&1; then
         printf "Yes.\n"
         have_python3=1
     else
-        printf "No.\n"
+        printf "No (will not install CFFI-based python bindings).\n"
     fi
 fi
 
 have_python3_cffi=0
 have_python3_pytest=0
 if [ $have_python3 -eq 1 ]; then
-    printf "Checking for python3 cffi... "
-    if "$python" -c 'import cffi' >/dev/null 2>&1; then
+    printf "Checking for python3 cffi and setuptools... "
+    if "$python" -c 'import cffi,setuptools; cffi.FFI().verify()' >/dev/null 2>&1; then
         printf "Yes.\n"
         have_python3_cffi=1
     else
-        printf "No.\n"
+        printf "No (will not install CFFI-based python bindings).\n"
     fi
+    rm -rf __pycache__  # cffi.FFI().verify() uses this space
 
     printf "Checking for python3 pytest (>= 3.0)... "
     conf=$(mktemp)
@@ -740,7 +741,7 @@ if [ $have_python3 -eq 1 ]; then
         printf "Yes.\n"
         have_python3_pytest=1
     else
-        printf "No.\n"
+        printf "No (will not test CFFI-based python bindings).\n"
     fi
     rm -f $conf
 fi