From a2b1b01045f908815090904239f24eb696d9dbd2 Mon Sep 17 00:00:00 2001
From: Mark Asselstine <mark.asselstine@windriver.com>
Date: Thu, 5 Jan 2017 16:51:02 -0500
Subject: [PATCH] configure.ac: allow PYTHON values to be passed via env

This allows the recipe to specify specific values instead of them
being 'discovered' which may lead to host contamination or similar
issues.

Updated for 4.9.0: Jeremy Puhlman

Signed-off-by: Mark Asselstine <mark.asselstine@windriver.com>
----
 configure.ac | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)


diff --git a/configure.ac b/configure.ac
index 37a0f86..9b77c7f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -106,26 +106,38 @@ fi
 
 AC_SUBST(PYTHON)
 
+if test -z "${PYTHON_VERSION}"; then
 PYTHON_VERSION=`${PYTHON} -c 'from sys import stdout; \
     import sysconfig; \
     stdout.write(sysconfig.get_config_var("VERSION"))'`
+fi
 
+if test -z "${PYTHON_LDVERSION}"; then
 PYTHON_LDVERSION=`${PYTHON} -c 'from sys import stdout; \
     import sysconfig; \
     stdout.write(sysconfig.get_config_var("LDVERSION") or "")'`
+fi
 
 if test x"${PYTHON_LDVERSION}" = x""; then
     PYTHON_LDVERSION=${PYTHON_VERSION}
 fi
 
+if test -z "${PYTHON_INCLUDEPY}"; then
 CPPFLAGS1=`${PYTHON} -c 'from sys import stdout; \
     import sysconfig; \
     stdout.write("-I" + sysconfig.get_config_var("INCLUDEPY"))'`
+else
+CPPFLAGS1="${PYTHON_INCLUDEPY}"
+fi
 
+if test -z "${PYTHON_CFLAGS}"; then
 CPPFLAGS2=`${PYTHON} -c 'from sys import stdout; \
     import sysconfig; \
     stdout.write(" ".join(filter(lambda x: x.startswith("-D"), \
     sysconfig.get_config_var("CFLAGS").split())))'`
+else
+CPPFLAGS2="${PYTHON_CFLAGS}"
+fi
 
 if test "${ENABLE_EMBEDDED}" != "yes"; then
 CPPFLAGS3="-DMOD_WSGI_DISABLE_EMBEDDED"
@@ -137,22 +149,42 @@ CPPFLAGS="${CPPFLAGS} ${CPPFLAGS1} ${CPPFLAGS2} ${CPPFLAGS3}"
 
 AC_SUBST(CPPFLAGS)
 
+if test -z "${PYTHON_LIBDIR}"; then
 PYTHONLIBDIR=`${PYTHON} -c 'from sys import stdout; \
     import sysconfig; \
     stdout.write(sysconfig.get_config_var("LIBDIR"))'`
+else
+PYTHONLIBDIR="${PYTHON_LIBDIR}"
+fi
+if test -z "${PYTHON_CFGDIR}"; then
 PYTHONCFGDIR=`${PYTHON} -c 'from sys import stdout; \
     import distutils.sysconfig; \
     stdout.write(distutils.sysconfig.get_python_lib(plat_specific=1, \
     standard_lib=1) +"/config")'`
+else
+PYTHONCFGDIR="${PYTHON_CFGDIR}"
+fi
+if test -z "${PYTHON_FRAMEWORKDIR}"; then
 PYTHONFRAMEWORKDIR=`${PYTHON} -c 'from sys import stdout; \
     import sysconfig; \
     stdout.write(sysconfig.get_config_var("PYTHONFRAMEWORKDIR"))'`
+else
+PYTHONFRAMEWORKDIR="${PYTHON_FRAMEWORKDIR}"
+fi
+if test -z "${PYTHON_FRAMEWORKPREFIX}"; then
 PYTHONFRAMEWORKPREFIX=`${PYTHON} -c 'from sys import stdout; \
     import sysconfig; \
     stdout.write(sysconfig.get_config_var("PYTHONFRAMEWORKPREFIX"))'`
+else
+PYTHONFRAMEWORKPREFIX="${PYTHON_FRAMEWORKPREFIX}"
+fi
+if test -z "${PYTHON_FRAMEWORK}"; then
 PYTHONFRAMEWORK=`${PYTHON} -c 'from sys import stdout; \
     import sysconfig; \
     stdout.write(sysconfig.get_config_var("PYTHONFRAMEWORK"))'`
+else
+PYTHONFRAMEWORK="${PYTHON_FRAMEWORK}"
+fi
 
 if test "${PYTHON_LDVERSION}" != "${PYTHON_VERSION}"; then
     PYTHONCFGDIR="${PYTHONCFGDIR}-${PYTHON_LDVERSION}"
@@ -180,12 +212,20 @@ if test "${PYTHONFRAMEWORKDIR}" = "no-framework" -o \
         LDLIBS1="-lpython${PYTHON_VERSION}"
     fi
 
+    if test -z "${PYTHON_LIBS}"; then
     LDLIBS2=`${PYTHON} -c 'from sys import stdout; \
         import sysconfig; \
         stdout.write(sysconfig.get_config_var("LIBS"))'`
+    else
+    LDLIBS2="${PYTHON_LIBS}"
+    fi
+    if test -z "${PYTHON_SYSLIBS}"; then
     LDLIBS3=`${PYTHON} -c 'from sys import stdout; \
         import sysconfig; \
         stdout.write(sysconfig.get_config_var("SYSLIBS"))'`
+    else
+    LDLIBS3="${PYTHON_SYSLIBS}"
+    fi
 else
     LDFLAGS1="-Wl,-F${PYTHONFRAMEWORKPREFIX} -framework ${PYTHONFRAMEWORK}"