change default Unix-style installation to use racket in path

Merge to v5.0

src/configure

@@ -576,7 +576,7 @@ PACKAGE_VERSION=
 PACKAGE_STRING=
 PACKAGE_BUGREPORT=
 
-ac_unique_file="PLT Scheme"
+ac_unique_file="Racket"
 ac_unique_file="racket/src/bignum.c"
 # Factoring default headers for most tests.
 ac_includes_default="\
@@ -2201,10 +2201,10 @@ else
     # Set prefix explicitly so we can use it during configure
     prefix="${ac_default_prefix}"
   fi
-  libpltdir="${libdir}/plt"
-  collectsdir="${libdir}/plt/collects"
-  includepltdir="${includedir}/plt"
-  docdir="${datadir}/plt/doc"
+  libpltdir="${libdir}/racket"
+  collectsdir="${libdir}/racket/collects"
+  includepltdir="${includedir}/racket"
+  docdir="${datadir}/racket/doc"
   MAKE_COPYTREE=copytree
   COLLECTS_PATH='${collectsdir}'
   INSTALL_ORIG_TREE=no
@@ -5855,6 +5855,7 @@ case $OS in
   FreeBSD)
     LIBS="$LIBS -rdynamic"
     DYN_CFLAGS="-fPIC"
+    GC_THREADS_FLAG="-DGC_FREEBSD_THREADS"
     enable_pthread=yes
     ;;
   OpenBSD)

src/racket/configure.ac

@@ -20,7 +20,7 @@
 # it needs to include C++ flags that we don't want for Racket.
 # hence PREFLAGS, which is initialized to the original CPPFLAGS.
 
-AC_INIT([PLT Scheme])
+AC_INIT([Racket])
 AC_CONFIG_SRCDIR(racket/src/bignum.c)
 AC_CONFIG_HEADERS([racket/mzconfig.h])
 
@@ -234,10 +234,10 @@ else
     # Set prefix explicitly so we can use it during configure
     prefix="${ac_default_prefix}"
   fi
-  libpltdir="${libdir}/plt"
-  collectsdir="${libdir}/plt/collects"
-  includepltdir="${includedir}/plt"
-  docdir="${datadir}/plt/doc"
+  libpltdir="${libdir}/racket"
+  collectsdir="${libdir}/racket/collects"
+  includepltdir="${includedir}/racket"
+  docdir="${datadir}/racket/doc"
   MAKE_COPYTREE=copytree
   COLLECTS_PATH='${collectsdir}'
   INSTALL_ORIG_TREE=no