# HG changeset patch

# Parent 23e27fc054b699f1f6530ef0458d990b1f834599

# User "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

# Date 1284399119 -7200

complibs: add option to use distro-provided libs

Now that some distros are catching up (eg. Debian testing at least),

add an option to use companion libs from the distro.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

diff --git a/config/companion_libs.in b/config/companion_libs.in

--- a/config/companion_libs.in

+++ b/config/companion_libs.in

@@ -4,6 +4,42 @@

 menu "Companion libraries"

+config COMPLIBS_DISTRO

+    bool

+    prompt "Trust companion libraries from the distro (READ HELP!)"

+    default n

+    depends on COMPLIBS_NEEDED

+    depends on EXPERIMENTAL

+    help

+      Most of the distributions current as of this writing lack the proper

+      version of the required companion libraries, or do not even package

+      those.  For example Debian Lenny has too old a version for PPL, and

+      does not provide MPC and CLooG.

+      

+      But now distributions are catching up, and some (most?) of them do

+      package the proper versions of those libraries. For example again,

+      Debian Squeeze (still in testing) has the proper versions now.

+      

+      If you want to trust your distribution for providing the companion

+      libraries, say 'Y' here, or if you want crosstool-NG to build them

+      for you, say 'N'.

+      

+      The default is 'N', to cope with stable productions systems that most

+      probably are using proven-stable distributions, and can not upgrade.

+      

+      Also, this is still experimental, so you'd better say 'N' if you are

+      not sure.

+      

+      Note-1: if you say 'Y' here, it is very probable that the libraries

+      will be linked in dynamically, and not static. This is not an issue

+      if you keep the toolchain on the machine where it was built, but can

+      become one if you want to move the toolchain to another machine, with

+      an older distro. You've been warned!

+      

+      Note-2: for now, this is an all-from-distro or all-from-crosstool-NG

+      setting. You can't use one lib from the distro, and build another

+      one from crosstool-NG.

+

 config COMPLIBS_NEEDED

     bool

     default n

@@ -11,37 +47,37 @@

 config GMP_NEEDED

     bool

     default n

-    select GMP

+    select GMP      if ! COMPLIBS_DISTRO

     select COMPLIBS_NEEDED

 config MPFR_NEEDED

     bool

     default n

-    select MPFR

+    select MPFR     if ! COMPLIBS_DISTRO

     select COMPLIBS_NEEDED

 config PPL_NEEDED

     bool

     default n

-    select PPL

+    select PPL      if ! COMPLIBS_DISTRO

     select COMPLIBS_NEEDED

 config CLOOG_NEEDED

     bool

     default n

-    select CLOOG

+    select CLOOG    if ! COMPLIBS_DISTRO

     select COMPLIBS_NEEDED

 config MPC_NEEDED

     bool

     default n

-    select MPC

+    select MPC      if ! COMPLIBS_DISTRO

     select COMPLIBS_NEEDED

 config LIBELF_NEEDED

     bool

     default n

-    select LIBELF

+    select LIBELF   if ! COMPLIBS_DISTRO

     select COMPLIBS_NEEDED

 config COMPLIBS