traverseda
/
cpython
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

closes bpo-22140: Prevent double substitution of prefix in python-config.sh (#3769) 

Fix the logic in python-config.sh to avoid attempting to substitute
prefix in a variable that might have already been subject to
substitution. This e.g. happened if @exec_prefix@ was defined as
"${prefix}" (which is the default of the configure script) -- in which
case the exec_prefix_build variable was initialized with
already-subtituted prefix, and then another round of substitution was
performed which might have resulted in duplicate prefix.

To avoid that, rename the variables so that the variables matching
likely configure names (prefix, exec_prefix) retain their original
values and a '_real' suffix is used for the real values of prefix.

Furthermore, replace the unnecessary prefix and exec_prefix
substitutions with direct prefix_real references since the sed
always replaced the whole string anyway by design.
This commit is contained in:
Michał Górny 2017-09-27 07:45:06 +02:00 committed by Benjamin Peterson
parent 31aca4bf79
commit 14086cfc5e
2 changed files with 14 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Misc/NEWS.d/next/Build/2017-09-26-22-39-58.bpo-22140.ZRf7Wn.rst Normal file
View File

@ -0,0 +1 @@
Prevent double substitution of prefix in python-config.sh.

25
Misc/python-config.sh.in
View File

@ -24,17 +24,18 @@ installed_prefix ()
echo $RESULT
}
prefix_build="@prefix@"
prefix_real=$(installed_prefix "$0")
# Use sed to fix paths from their built-to locations to their installed-to
# locations.
prefix=$(echo "$prefix_build" | sed "s#$prefix_build#$prefix_real#")
exec_prefix_build="@exec_prefix@"
exec_prefix=$(echo "$exec_prefix_build" | sed "s#$exec_prefix_build#$prefix_real#")
includedir=$(echo "@includedir@" | sed "s#$prefix_build#$prefix_real#")
libdir=$(echo "@libdir@" | sed "s#$prefix_build#$prefix_real#")
CFLAGS=$(echo "@CFLAGS@" | sed "s#$prefix_build#$prefix_real#")
# locations. Keep prefix & exec_prefix using their original values in case
# they are referenced in other configure variables, to prevent double
# substitution, issue #22140.
prefix="@prefix@"
exec_prefix="@exec_prefix@"
exec_prefix_real=${prefix_real}
includedir=$(echo "@includedir@" | sed "s#$prefix#$prefix_real#")
libdir=$(echo "@libdir@" | sed "s#$prefix#$prefix_real#")
CFLAGS=$(echo "@CFLAGS@" | sed "s#$prefix#$prefix_real#")
VERSION="@VERSION@"
LIBM="@LIBM@"
LIBC="@LIBC@"
@ -47,8 +48,8 @@ LINKFORSHARED="@LINKFORSHARED@"
OPT="@OPT@"
PY_ENABLE_SHARED="@PY_ENABLE_SHARED@"
LDVERSION="@LDVERSION@"
LIBDEST=${prefix}/lib/python${VERSION}
LIBPL=$(echo "@LIBPL@" | sed "s#$prefix_build#$prefix_real#")
LIBDEST=${prefix_real}/lib/python${VERSION}
LIBPL=$(echo "@LIBPL@" | sed "s#$prefix#$prefix_real#")
SO="@EXT_SUFFIX@"
PYTHONFRAMEWORK="@PYTHONFRAMEWORK@"
INCDIR="-I$includedir/python${VERSION}${ABIFLAGS}"
@ -73,10 +74,10 @@ for ARG in "$@"
do
case "$ARG" in
--prefix)
echo "$prefix"
echo "$prefix_real"
;;
--exec-prefix)
echo "$exec_prefix"
echo "$exec_prefix_real"
;;
--includes)
echo "$INCDIR $PLATINCDIR"