[130423] trunk/dports/lang/libcxxabi/Portfile

[jeremyhu at macports.org]

Revision: 130423
          https://trac.macports.org/changeset/130423
Author:   jeremyhu at macports.org
Date:     2014-12-29 22:50:58 -0800 (Mon, 29 Dec 2014)
Log Message:
-----------
libcxxabi: Add a replacemnt_libcxx variant

Modified Paths:
--------------
    trunk/dports/lang/libcxxabi/Portfile

Modified: trunk/dports/lang/libcxxabi/Portfile
===================================================================
--- trunk/dports/lang/libcxxabi/Portfile	2014-12-30 06:42:03 UTC (rev 130422)
+++ trunk/dports/lang/libcxxabi/Portfile	2014-12-30 06:50:58 UTC (rev 130423)
@@ -35,19 +35,24 @@
 variant universal {}
 use_configure no
 
-if {${os.major} >= 11} {
-    fetch {}
-    build {}
-    destroot {
-        xinstall -d ${destroot}${prefix}/share/doc/${name}
-        system "echo ${name} is an empty port on this OS version because the functionality is already provided by the OS. > ${destroot}${prefix}/share/doc/${name}/README.txt"
+platform darwin {
+    if {${os.major} < 10} {
+        pre-fetch {
+            ui_error "${name} is not supported on Leopard or earlier."
+            error "unsupported platform"
+        }
     }
-} elseif {${os.major} < 10} {
-    pre-fetch {
-        ui_error "${name} is not supported on Leopard or earlier."
-        error "unsupported platform"
+
+    if {${os.major} < 11} {
+        post-activate {
+            system "ditto ${root_path} /"
+        }
     }
-} else {
+}
+
+variant replacemnt_libcxx description {EXPERTS ONLY: Build a replacement libcxxabi and libcxx even if it is already part of the base OS.} {}
+
+if {${os.major} < 11 || [variant_isset replacemnt_libcxx]} {
     # 3.5 and 3.6 are blacklisted to prevent dependency cycles
     compiler.blacklist *gcc* {clang < 100} macports-clang-3.5 macports-clang-3.6
 
@@ -64,9 +69,12 @@
 
     # We want to use the host's libc++abi everywhere because we want to ensure
     # that only *ONE* copy of this library is in any process's address space.
-    # On newer OS versions (Lion+), this port does not install anything.  On
-    # Snow Leopard, this port provide this library in /usr for binary
+    # On Snow Leopard, this port provides this library in /usr for binary
     # compatibility with Lion and later.
+    #
+    # On newer OS version, this port does not install the content to /usr and
+    # just leaves it to expert users who may want to replace their system
+    # runtime.
 
     destroot {
         xinstall -m 755 -d ${destroot}${root_path}/usr/lib
@@ -75,9 +83,12 @@
         xinstall -m 755 -d ${destroot}${root_path}/usr/include
         xinstall -m 644 ${worksrcpath}/include/cxxabi.h ${destroot}${root_path}/usr/include
     }
-
-    post-activate {
-        system "ditto ${root_path} /"
+} else {
+    fetch {}
+    build {}
+    destroot {
+        xinstall -d ${destroot}${prefix}/share/doc/${name}
+        system "echo ${name} is an empty port on this OS version because the functionality is already provided by the OS. > ${destroot}${prefix}/share/doc/${name}/README.txt"
     }
 }
 
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