Issue 22878: PEP 477 - "make install" and "make altinstall" integration

The backport of ensurepip to 2.7.9 allows pip to optionally be installed
or upgraded using the bundled pip provided by the new ensurepip module.
The option can be specified persistently using the configure option:

    ./configure --with-ensurepip[=upgrade|install|no]

It can also be overridden on either the "install" or "altinstall" targets:

    make [alt]install ENSUREPIP=[upgrade|install|no]

For Python 2, the default option is "no" (do not install pip).

1 files changed, 30 insertions, 0 deletions

diff --git a/configure b/configure
index 4a698f3..68033f5 100755
--- a/configure
+++ b/configure
@@ -624,6 +624,7 @@ ac_includes_default="\
 #endif"
 
 ac_subst_vars='LTLIBOBJS
+ENSUREPIP
 SRCDIRS
 THREADHEADERS
 UNICODE_OBJS
@@ -807,6 +808,7 @@ with_libm
 with_libc
 enable_big_digits
 enable_unicode
+with_ensurepip
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1486,6 +1488,9 @@ Optional Packages:
   --with-fpectl           enable SIGFPE catching
   --with-libm=STRING      math library
   --with-libc=STRING      C library
+  --with(out)-ensurepip=[=OPTION]
+                          "install" or "upgrade" using bundled pip, default is
+                          "no"
 
 Some influential environment variables:
   CC          C compiler command
@@ -14604,6 +14609,31 @@ done
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: done" >&5
 $as_echo "done" >&6; }
 
+# ensurepip option
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ensurepip" >&5
+$as_echo_n "checking for ensurepip... " >&6; }
+
+# Check whether --with-ensurepip was given.
+if test "${with_ensurepip+set}" = set; then :
+  withval=$with_ensurepip;
+else
+  with_ensurepip=no
+fi
+
+case $with_ensurepip in #(
+  yes|upgrade) :
+    ENSUREPIP=upgrade ;; #(
+  install) :
+    ENSUREPIP=install ;; #(
+  no) :
+    ENSUREPIP=no ;; #(
+  *) :
+    as_fn_error $? "--with-ensurepip=upgrade|install|no" "$LINENO" 5 ;;
+esac
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ENSUREPIP" >&5
+$as_echo "$ENSUREPIP" >&6; }
+
+
 # generate output files
 ac_config_files="$ac_config_files Makefile.pre Modules/Setup.config Misc/python.pc"