path: root/docs
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authorGravatar Yann E. MORIN <yann.morin.1998@free.fr>2013-09-21 00:00:30 +0200
committerGravatar Peter Korsgaard <jacmet@sunsite.dk>2013-09-22 11:47:35 +0200
commit60cb290475ce8baa828825ccf235efb93132c8c1 (patch)
treedf2846055ef9d5a14bbc436c6be0219733517b56 /docs
parent3874e5cba9f062a620aa1fff13ad3673754d5c2e (diff)
toolchain/wrapper: add option to print one argument per line
In case there are many arguments passed to the tools, the command line can get very long, and difficult to parse visually. For example, the Linux kernel passes a lot of arguments to gcc (at least 45, which gives 53 with our hard-coded args). Looking at such a command line is daunting. So, add the possibility to print each argument on its own line. Also, enclose all args between single quotes, so the command line can be safely copy-pasted without special chars (spaces, $) being inrerpreted by the shell. Add blurb about toolchain-wrapper to documentation at the same time. Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com> Acked-by: Luca Ceresoli <luca@lucaceresoli.net> Tested-by: Luca Ceresoli <luca@lucaceresoli.net> Acked-by: Samuel Martin <s.martin49@gmail.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Diffstat (limited to 'docs')
1 files changed, 11 insertions, 0 deletions
diff --git a/docs/manual/customize-toolchain.txt b/docs/manual/customize-toolchain.txt
index 811a6dc7f9..82ecc28431 100644
--- a/docs/manual/customize-toolchain.txt
+++ b/docs/manual/customize-toolchain.txt
@@ -17,6 +17,17 @@ generate it.
It also requires to set the Buildroot settings according to the toolchain ones
(see xref:external-toolchain-backend[]).
+When using an external toolchain, Buildroot generates a wrapper program, that
+passes the appropriate options (according to the configuration) to the
+external toolchain programs. In case you need to debug this wrapper, you can
+set the environment variable BR_DEBUG_WRAPPER to either one of:
+* +0+, empty or not set: no debug
+* +1+: trace all arguments on a single line
+* +2+: trace one argument per line
Using the internal Buildroot toolchain backend