[Buildroot] [git commit] arch: BINFMT_FLAT_SHARED is not really shared for buildroot purposes
thomas.petazzoni at free-electrons.com
Mon Mar 30 21:07:48 UTC 2015
Although BINFMT_FLAT_SHARED is indeed a shared library format, it does
not support dynamic library loading with dlopen(). So for buildroot
purposes, BR2_STATIC_LIBS shouldn't be selected.
As it happens, the compiler options that are added for
BINFMT_FLAT_SHARED also make the compiler ignore the -static option, so
we can simply force BR2_STATIC_LIBS and things work out perfectly.
Therefore, remove the select of BR2_BINFMT_SUPPORTS_SHARED from
BINFMT_FLAT_SHARED, which in turn makes sure that BR2_STATIC_LIBS is
[Arnout: rewrite commit message, add explanatory comment]
Signed-off-by: Sonic Zhang <sonic.zhang at analog.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout at mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
arch/Config.in | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/arch/Config.in b/arch/Config.in
index 16ad8be..59bf84a 100644
@@ -295,7 +295,12 @@ config BR2_BINFMT_FLAT_SEP_DATA
bool "Shared binary"
- select BR2_BINFMT_SUPPORTS_SHARED
+ # Even though this really generates shared binaries, there is no libdl
+ # and dlopen() cannot be used. So packages that require shared
+ # libraries cannot be built. Therefore, we don't select
+ # BR2_BINFMT_SUPPORTS_SHARED and therefore force BR2_STATIC_LIBS.
+ # Although this adds -static to the compilation, that's not a problem
+ # because the -mid-shared-library option overrides it.
Allow to load and link indiviual FLAT binaries at run time.
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