diff options
| author | Yann E. MORIN <yann.morin.1998@free.fr> | 2014-07-31 00:57:15 +0200 |
|---|---|---|
| committer | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2014-07-31 23:51:39 +0200 |
| commit | a930d9cef6bdcf8de7d086ea66d977530200b8e0 (patch) | |
| tree | 70c8a3bbe98b38d04b22b28c62faa5ffbfd11527 /docs | |
| parent | c9f5a86eaeb16c76f8b1f9cb940d2207759dd8d3 (diff) | |
toolchain: linker options with a $ sign are not supported
As reported in bug #7172 [0], setting BR2_TARGET_LDFLAGS to a value
containing a $ sign can lead to unexpected results.
This is because it is very hard to know when the $ sign gets evaluated:
- in the Buildroot-level make
- in the shell called by the Buildroot-level make
- in the package's own build-system, either at configure time, in the
Makefile, in a shell in the Makefile...
So, it is very difficult to know how much escaping that would need.
A proposal is to use a shell variable to pass such values unmolested.
But it is not that simple either, since it still contains a $ sign, and
there is not much certainty as to when it would be evaluated.
Instead, just document this limitation, both in the help text for
BR2_TARGET_LDFLAGS, and in the known-issues section in the manual.
Does not really fix #7172, but at least the limitation is documented.
[0] https://bugs.buildroot.org/show_bug.cgi?id=7172
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Mike Zick <minimod@morethan.org>
Reviewed-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/manual/known-issues.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/docs/manual/known-issues.txt b/docs/manual/known-issues.txt index 08469e937..5eaded98c 100644 --- a/docs/manual/known-issues.txt +++ b/docs/manual/known-issues.txt @@ -3,6 +3,10 @@ = Known issues +* It is not possible to pass extra linker options via +BR2_TARGET_LDFLAGS+ + if such options contain a +$+ sign. For example, the following is known + to break: +BR2_TARGET_LDFLAGS="-Wl,-rpath=\'$ORIGIN/../lib'"+ + * The +ltp-testsuite+ package does not build with the default uClibc configuration used by the Buildroot toolchain backend. The LTP testsuite uses several functions that are considered obsolete, such |