Build of JDK7 trunk fails on Fedora 14 due to SELinux check:
libjvm.so is marked as trying to execute its stack, so in order for build to proceed one has to disable this check, either by turning off the SELinux functionality or by disabling just that stack execution check thus:

  sudo setsebool allow_execstack=on

This is the error I saw in the build:

cd linux_amd64_compiler2/fastdebug && ./test_gamma
java full version "1.6.0_23-b05"
./gamma: error while loading shared libraries: libjvm.so: cannot enable executable stack as shared object requires: Permission denied

With strace we see what's happening:

[pid 2700] execve("./gamma", ["./gamma", "-Xbatch", "-showversion", "Queens"], [/* 36 vars */]) = 0
[pid 2700] brk(0) = 0x9e7000
[pid 2700] mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f789c39a000
[pid 2700] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
[pid 2700] open("./tls/x86_64/libjvm.so", O_RDONLY) = -1 ENOENT (No such file or directory)
[pid 2700] open("./tls/libjvm.so", O_RDONLY) = -1 ENOENT (No such file or directory)
[pid 2700] open("./x86_64/libjvm.so", O_RDONLY) = -1 ENOENT (No such file or directory)
[pid 2700] open("./libjvm.so", O_RDONLY) = 4
[pid 2700] read(4, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\240\215 \0\0\0\0\0"..., 832) = 832
[pid 2700] fstat(4, {st_mode=S_IFREG|0775, st_size=19803690, ...}) = 0
[pid 2700] getcwd("/home/dw136774/jdk7-sandbox2/tl/build/linux-amd64-fastdebug/hotspot/outputdir/linux_amd64_compiler2/fastdebug", 128) = 110
[pid 2700] mmap(NULL, 20004456, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 4, 0) = 0x7f789b086000
[pid 2700] mprotect(0x7f789c049000, 2097152, PROT_NONE) = 0
[pid 2700] mmap(0x7f789c249000, 765952, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 4, 0xfc3000) = 0x7f789c249000
[pid 2700] mmap(0x7f789c304000, 613992, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f789c304000
[pid 2700] mprotect(0x7fff32fa8000, 4096, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_GROWSDOWN) = -1 EACCES (Permission denied)
[pid 2700] close(4) = 0
[pid 2700] writev(2, [{"./gamma", 7}, {": ", 2}, {"error while loading shared libra"..., 36}, {": ", 2}, {"libjvm.so", 9}, {": ", 2}, {"cannot en\
able executable stack a"..., 56}, {": ", 2}, {"Permission denied", 17}, {"\n", 1}], 10./gamma: error while loading shared libraries: libjvm.so: ca\
nnot enable executable stack as shared object requires: Permission denied