[libgpiod] [PATCH] build: check for python-config in configure

[joelsavitz@xxxxxxxxx]

From: Joel Savitz <joelsavitz@xxxxxxxxx>

Currently, configure succeeds when python is installed without its
development components, i.e. python-config and headers. The subsequent
make will fail when gcc cannot locate Python.h.

This patch fixes that behavior by throwing an error at configure-time if
python-config cannot be found.

Signed-off-by: Joel Savitz <joelsavitz@xxxxxxxxx>
---
 configure.ac | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/configure.ac b/configure.ac
index 41321c1..066c1ad 100644
--- a/configure.ac
+++ b/configure.ac
@@ -183,6 +183,8 @@ if test "x$with_bindings_python" = xtrue
 then
 	AM_PATH_PYTHON([3.0], [],
 		[AC_MSG_ERROR([python3 not found - needed for python bindings])])
+	AC_CHECK_FILE(["$PYTHON-config"], [],
+		[AC_MSG_ERROR([python3-config not found - needed for python bindings])])
 	AS_IF([test -z "$PYTHON_CPPFLAGS"],
 		[AC_SUBST(PYTHON_CPPFLAGS, [`$PYTHON-config --includes`])])
 	AS_IF([test -z "$PYTHON_LIBS"],
-- 
2.21.0