libcxxabi: Skip dylib fixups for version symlinks

Apart from being a no-op, this seems to cause the install to make a
copy, rather than keeping the symlinks intact.

pkgs/development/compilers/llvm/10/libcxxabi/default.nix

@@ -42,6 +42,8 @@ stdenv.mkDerivation {
 
   preInstall = lib.optionalString stdenv.isDarwin ''
     for file in lib/*.dylib; do
+      if [ -L "$file" ]; then continue; fi
+
       # Fix up the install name. Preserve the basename, just replace the path.
       installName="$out/lib/$(basename $(otool -D $file | tail -n 1))"
 

pkgs/development/compilers/llvm/11/libcxxabi/default.nix

@@ -46,6 +46,8 @@ stdenv.mkDerivation {
 
   preInstall = lib.optionalString stdenv.isDarwin ''
     for file in lib/*.dylib; do
+      if [ -L "$file" ]; then continue; fi
+
       # Fix up the install name. Preserve the basename, just replace the path.
       installName="$out/lib/$(basename $(otool -D $file | tail -n 1))"
 

pkgs/development/compilers/llvm/12/libcxxabi/default.nix

@@ -44,6 +44,8 @@ stdenv.mkDerivation {
 
   preInstall = lib.optionalString stdenv.isDarwin ''
     for file in lib/*.dylib; do
+      if [ -L "$file" ]; then continue; fi
+
       # Fix up the install name. Preserve the basename, just replace the path.
       installName="$out/lib/$(basename $(otool -D $file | tail -n 1))"
 

pkgs/development/compilers/llvm/13/libcxxabi/default.nix

@@ -41,6 +41,8 @@ stdenv.mkDerivation rec {
 
   preInstall = lib.optionalString stdenv.isDarwin ''
     for file in lib/*.dylib; do
+      if [ -L "$file" ]; then continue; fi
+
       # Fix up the install name. Preserve the basename, just replace the path.
       installName="$out/lib/$(basename $(otool -D $file | tail -n 1))"
 

pkgs/development/compilers/llvm/14/libcxxabi/default.nix

@@ -52,6 +52,8 @@ stdenv.mkDerivation rec {
   installPhase = if stdenv.isDarwin
     then ''
       for file in lib/*.dylib; do
+        if [ -L "$file" ]; then continue; fi
+
         # Fix up the install name. Preserve the basename, just replace the path.
         installName="$out/lib/$(basename $(otool -D $file | tail -n 1))"
 

pkgs/development/compilers/llvm/5/libcxxabi/default.nix

@@ -27,6 +27,8 @@ stdenv.mkDerivation {
 
   preInstall = lib.optionalString stdenv.isDarwin ''
     for file in lib/*.dylib; do
+      if [ -L "$file" ]; then continue; fi
+
       # Fix up the install name. Preserve the basename, just replace the path.
       installName="$out/lib/$(basename $(otool -D $file | tail -n 1))"
 

pkgs/development/compilers/llvm/6/libcxxabi/default.nix

@@ -27,6 +27,8 @@ stdenv.mkDerivation {
 
   preInstall = lib.optionalString stdenv.isDarwin ''
     for file in lib/*.dylib; do
+      if [ -L "$file" ]; then continue; fi
+
       # Fix up the install name. Preserve the basename, just replace the path.
       installName="$out/lib/$(basename $(otool -D $file | tail -n 1))"
 

pkgs/development/compilers/llvm/7/libcxxabi/default.nix

@@ -46,6 +46,8 @@ stdenv.mkDerivation {
 
   preInstall = lib.optionalString stdenv.isDarwin ''
     for file in lib/*.dylib; do
+      if [ -L "$file" ]; then continue; fi
+
       # Fix up the install name. Preserve the basename, just replace the path.
       installName="$out/lib/$(basename $(otool -D $file | tail -n 1))"
 

pkgs/development/compilers/llvm/8/libcxxabi/default.nix

@@ -42,6 +42,8 @@ stdenv.mkDerivation {
 
   preInstall = lib.optionalString stdenv.isDarwin ''
     for file in lib/*.dylib; do
+      if [ -L "$file" ]; then continue; fi
+
       # Fix up the install name. Preserve the basename, just replace the path.
       installName="$out/lib/$(basename $(otool -D $file | tail -n 1))"
 

pkgs/development/compilers/llvm/9/libcxxabi/default.nix

@@ -42,6 +42,8 @@ stdenv.mkDerivation {
 
   preInstall = lib.optionalString stdenv.isDarwin ''
     for file in lib/*.dylib; do
+      if [ -L "$file" ]; then continue; fi
+
       # Fix up the install name. Preserve the basename, just replace the path.
       installName="$out/lib/$(basename $(otool -D $file | tail -n 1))"
 

pkgs/development/compilers/llvm/git/libcxxabi/default.nix

@@ -70,6 +70,8 @@ stdenv.mkDerivation rec {
 
   preInstall = lib.optionalString stdenv.isDarwin ''
     for file in lib/*.dylib; do
+      if [ -L "$file" ]; then continue; fi
+
       # Fix up the install name. Preserve the basename, just replace the path.
       installName="$out/lib/$(basename $(otool -D $file | tail -n 1))"