path: root/boot
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authorGravatar Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>2019-02-21 13:56:51 +0100
committerGravatar Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>2019-02-21 23:50:59 +0100
commit4c24006b0e403d786c1a2d7bcb4127440cc13b32 (patch)
tree1369cc11057c2c626420d6a63843dc63c4feb7cc /boot
parentda304a832b9a0f5f5ef62c244f67e5f5ae39748e (diff)
package/dtc: additional fix of include guards for older u-boot
With recent dtc but old u-boot, compilation issues occur related to libfdt. These problems really are u-boot issue since it does not properly set include paths so that its own headers are included. Nevertheless, since the u-boot version is typically decided by users and stuck at some version provided by a SoC or board vendor, it is not feasible to fix those old versions. Instead, already several fixes were made in the past, in Buildroot. See commits: c7ffd8a75d5 "package/dtc: fix include guards for older kernel/u-boot" f437bf547ca "uboot: fix build for older uboot source trees" bf733342324 "uboot: fix build when libfdt-devel is installed system-wide" 0bf80e4bcd5 "uboot: ensure host includes are searched before system default includes" b15a7a62d3f "uboot: revert "uboot: use local libfdt.h"" baae5156ce3 "uboot: use local fdt headers" 3a6573ccee2 "uboot: use local libfdt.h" Commit c7ffd8a75d55e24d793106eabbb80964ab91081f fixes the problem caused by dtc having changed their include guards from _FOO_H to FOO_H (leading underscore removed). Old u-boot would still use _FOO_H, which (combined with host-dtc headers that use FOO_H) would cause the inclusion of two different copies of the same nominal include file, e.g. libfdt.h or libfdt_env.h, causing 'error: redefinition of xxx' compilation issues. The fix sets the 'new' include guard when the 'old' one is detected, preventing a second inclusion of the same nominal file. For some u-boot versions, however, this change not only needs to be made in libfdt.h and libfdt_env.h, but also in 'fdt.h'. Update the dtc patch to do just that. Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com> Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
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