configure: check existence of python3 setuptools and dev package

The notmuch2 CFFI-based Python interface is not buildable unless
python3 dev package and python3 setuptools are installed.

Check that these exist in configure (and disable notmuch2 bindings
build if not) so that build of these bindings don't fail when make(1)
is executed.

diff --git a/configure b/configure
index 32a836bbdb7bcfb9fdc4ffb535d5df2dddfac767..e4c738e527ec2b5f4bca68f16469a41d379717ae 100755 (executable)
--- a/configure
+++ b/configure
@@ -711,12 +711,14 @@ if [ $have_python -eq 0 ]; then
     errors=$((errors + 1))
 fi
 
     errors=$((errors + 1))
 fi
 

-have_python3=0
+have_python3_dev=0

 if [ $have_python -eq 1 ]; then
 if [ $have_python -eq 1 ]; then

-    printf "Checking for python3..."
-    if "$python" -c 'import sys; assert sys.version_info >= (3,0)' > /dev/null 2>&1; then
+    printf "Checking for python3 dev..."
+    if "$python" -c 'import os, sys, sysconfig;
+assert sys.version_info >= (3,0)
+assert os.path.isfile(sysconfig.get_config_h_filename())' >/dev/null 2>&1; then

         printf "Yes.\n"
         printf "Yes.\n"

-        have_python3=1
+        have_python3_dev=1

     else
         printf "No.\n"
     fi
     else
         printf "No.\n"
     fi


@@ -724,9 +726,9 @@ fi
 
 have_python3_cffi=0
 have_python3_pytest=0
 
 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
+if [ $have_python3_dev -eq 1 ]; then
+    printf "Checking for python3 cffi and setuptools... "
+    if "$python" -c 'import cffi; import setuptools' >/dev/null 2>&1; then

         printf "Yes.\n"
         have_python3_cffi=1
     else
         printf "Yes.\n"
         have_python3_cffi=1
     else