diff options
Diffstat (limited to 'net/haproxy/patches/0025-DOC-remove-references-to-CPU-native-in-the-README.patch')
| -rw-r--r-- | net/haproxy/patches/0025-DOC-remove-references-to-CPU-native-in-the-README.patch | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/net/haproxy/patches/0025-DOC-remove-references-to-CPU-native-in-the-README.patch b/net/haproxy/patches/0025-DOC-remove-references-to-CPU-native-in-the-README.patch new file mode 100644 index 000000000..f1a3c0ce3 --- /dev/null +++ b/net/haproxy/patches/0025-DOC-remove-references-to-CPU-native-in-the-README.patch @@ -0,0 +1,48 @@ +From 94fb38fbb77e664e4f41343257a26ae5bab40d1d Mon Sep 17 00:00:00 2001 +From: Willy Tarreau <w@1wt.eu> +Date: Thu, 10 Jul 2014 20:24:25 +0200 +Subject: [PATCH 25/25] DOC: remove references to CPU=native in the README + +Certain compilers running in virtualized environments may produce code +that the same processor cannot execute with -march=native, either because +of hypervisor bugs reporting wrong CPU features, or because of compiler +bugs forgetting to check CPU features. So better stop recommending this +combination so that users don't get trapped anymore. +(cherry picked from commit 817dad50b02d1a82d495dfea4eab9e3a91127391) +--- + README | 9 +++++---- + 1 file changed, 5 insertions(+), 4 deletions(-) + +diff --git a/README b/README +index 0ef0179..e2b8570 100644 +--- a/README ++++ b/README +@@ -53,8 +53,9 @@ one of the following choices to the CPU variable : + - i686 for intel PentiumPro, Pentium 2 and above, AMD Athlon + - i586 for intel Pentium, AMD K6, VIA C3. + - ultrasparc : Sun UltraSparc I/II/III/IV processor +- - native : use the build machine's specific processor optimizations +- - generic : any other processor or no specific optimization. (default) ++ - native : use the build machine's specific processor optimizations. Use with ++ extreme care, and never in virtualized environments (known to break). ++ - generic : any other processor or no CPU-specific optimization. (default) + + Alternatively, you may just set the CPU_CFLAGS value to the optimal GCC options + for your platform. +@@ -132,11 +133,11 @@ And I build it this way on OpenBSD or FreeBSD : + + And on a classic Linux with SSL and ZLIB support (eg: Red Hat 5.x) : + +- $ make TARGET=linux26 CPU=native USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1 ++ $ make TARGET=linux26 USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1 + + And on a recent Linux >= 2.6.28 with SSL and ZLIB support : + +- $ make TARGET=linux2628 CPU=native USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1 ++ $ make TARGET=linux2628 USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1 + + In order to build a 32-bit binary on an x86_64 Linux system with SSL support + without support for compression but when OpenSSL requires ZLIB anyway : +-- +1.8.5.5 + |