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authorGravatar Thomas Petazzoni <thomas.petazzoni@bootlin.com>2019-08-03 15:22:27 +0200
committerGravatar Thomas Petazzoni <thomas.petazzoni@bootlin.com>2019-08-03 15:28:32 +0200
commit3b28ca0cf6eecc6e8297176c2c49d2312920fa17 (patch)
tree3f60a4af4507745258b97e48f190942134a3773c /package/boost
parent13d470fe91c6095f14e69ff319d2ac39fc0d3e43 (diff)
downloadbuildroot-3b28ca0cf6eecc6e8297176c2c49d2312920fa17.tar.gz
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package/boost: fix RISC-V musl endian detection
The recent addition of a RISC-V musl toolchain uncovered an issue in Boost's endianness detection. Boost endianness detection only works for C libraries that pretend to be glibc *or* if the architecture is explicitly handled by Boost endian.h header. Neither were true for RISC-V musl, so we slightly patch boost to fix this problem. Fixes: http://autobuild.buildroot.net/results/a40b600a7d0fdb6a8a1ded7883b4936f120811f5/ Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Diffstat (limited to 'package/boost')
-rw-r--r--package/boost/0004-add-riscv-endian-detection.patch36
1 files changed, 36 insertions, 0 deletions
diff --git a/package/boost/0004-add-riscv-endian-detection.patch b/package/boost/0004-add-riscv-endian-detection.patch
new file mode 100644
index 0000000000..879838df3a
--- /dev/null
+++ b/package/boost/0004-add-riscv-endian-detection.patch
@@ -0,0 +1,36 @@
+Add RISC-V endian detection
+
+boost/predef/other/endian.h has two ways of detecting the endianess:
+
+ (1) It includes <endian.h> if BOOST_LIB_C_GNU is defined, and then
+ use __BYTE_ORDER to decide the endianness.
+
+ (2) Otherwise, if (1) was not possible for some reason, it uses
+ architecture defines to decide the endianness.
+
+(1) works perfectly fine with glibc toolchains, because
+BOOST_LIB_C_GNU is defined, but it doesn't work with musl. Due to
+this, <endian.h> is not included, __BYTE_ORDER is not defined, and
+method (1) does not work, causing build failures on musl toolchains
+that don't have explicit handling by architecture name (method 2).
+
+So this commit fixes RISC-V musl build by adding support for the
+__riscv architecture define, to determine that the endianness is
+little endian.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
+
+Index: b/boost/predef/other/endian.h
+===================================================================
+--- a/boost/predef/other/endian.h
++++ b/boost/predef/other/endian.h
+@@ -127,7 +127,8 @@
+ defined(__AARCH64EL__) || \
+ defined(_MIPSEL) || \
+ defined(__MIPSEL) || \
+- defined(__MIPSEL__)
++ defined(__MIPSEL__) || \
++ defined(__riscv)
+ # undef BOOST_ENDIAN_LITTLE_BYTE
+ # define BOOST_ENDIAN_LITTLE_BYTE BOOST_VERSION_NUMBER_AVAILABLE
+ # endif