[gcc r13-2979] Arrange to --disable-shared by default for VxWorks

[Olivier Hainque]

https://gcc.gnu.org/g:9b8ffbb8a0cadd68bf7887c5655a29ec04060111

commit r13-2979-g9b8ffbb8a0cadd68bf7887c5655a29ec04060111
Author: Olivier Hainque <hainque@adacore.com>
Date:   Fri Dec 3 17:48:18 2021 +0000

    Arrange to --disable-shared by default for VxWorks
    
    This change makes sure that shared libraries for VxWorks are
    only built on explicit request, when configured with --enable-shared.
    
    As the support to build shared libs gets in very incrementally,
    this provides us with a robust way to guard the relevant pieces
    and reduce the risks of accidentally breaking a platform not yet
    ready for it.
    
    2022-09-30  Olivier Hainque  <hainque@adacore.com>
    
            * configure.ac (*vxworks*): If enable_shared is not
            set, set to "no" and add --disable-shared to target and
            host_configargs.
            * configure: Regenerate.

Diff:
---
 configure    | 11 +++++++++++
 configure.ac | 11 +++++++++++
 2 files changed, 22 insertions(+)

diff --git a/configure b/configure
index e7604dc6ff0..d9aa84c6138 100755
--- a/configure
+++ b/configure
@@ -10263,6 +10263,17 @@ case "${target}" in
   mep*)
     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
     ;;
+  # The VxWorks support for shared libraries is getting in
+  # incrementally.  Make sure it doesn't get activated implicitly:
+  *vxworks*)
+    if test "${enable_shared-unset}" = unset ; then
+      enable_shared=no
+      # So the build of libraries knows ...
+      target_configargs="${target_configargs} --disable-shared"
+      # So gcc knows ...
+      host_configargs="${host_configargs} --disable-shared"
+    fi
+    ;;
 esac
 
 # Makefile fragments.
diff --git a/configure.ac b/configure.ac
index 3cfd9b41fca..2cff32e300e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3440,6 +3440,17 @@ case "${target}" in
   mep*)
     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
     ;;
+  # The VxWorks support for shared libraries is getting in
+  # incrementally.  Make sure it doesn't get activated implicitly:
+  *vxworks*)
+    if test "${enable_shared-unset}" = unset ; then
+      enable_shared=no
+      # So the build of libraries knows ...
+      target_configargs="${target_configargs} --disable-shared"
+      # So gcc knows ...
+      host_configargs="${host_configargs} --disable-shared"
+    fi
+    ;;
 esac
 
 # Makefile fragments.