[ovs-dev] [PATCH] INSTALL.md: Document how to add custom compiler flags.
Ben Pfaff
blp at nicira.com
Thu Apr 2 16:52:03 UTC 2015
CC: Mark B Kavanagh <mark.b.kavanagh at intel.com>
Signed-off-by: Ben Pfaff <blp at nicira.com>
---
INSTALL.md | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/INSTALL.md b/INSTALL.md
index 273093b..cde9a20 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -192,6 +192,14 @@ To use 'clang' compiler:
`% ./configure CC=clang`
+To supply special flags to the C compiler, specify them as CFLAGS on
+the configure command line. If you want the default CFLAGS, which
+include "-g" to build debug symbols and "-O2" to enable optimizations,
+you must include them yourself. For example, to build with the
+default CFLAGS plus "-mssse3", you might run configure as follows:
+
+ `% ./configure CFLAGS="-g -O2 -mssse3"`
+
To build the Linux kernel module, so that you can run the
kernel-based switch, pass the location of the kernel build
directory on --with-linux. For example, to build for a running
--
2.1.3
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