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一、conflicting types for ‘copy_file_range’

./…/misc/create_inode.c:395:18: error: conflicting types for ‘copy_file_range’static errcode_t copy_file_range(ext2_filsys fs, int fd, ext2_file_t e2_file,^In file included from ./…/misc/create_inode.c:19:0:/usr/include/unistd.h:1110:9: note: previous declaration of ‘copy_file_range’ was heressize_t copy_file_range (int __infd, __off64_t *__pinoff,^

解决办法：buildroot-2017.02.3/output/build/host-e2fsprogs-1.43.3/misc/create_inode.c屏蔽掉 #include <unistd.h>

二、openwrt 编译时报SOURCE_DATE_EPOCH must expand to a non-negative integer less than or equal to 25340230

log:

mkyaffs2image.c: In function 'main':mkyaffs2image.c:470:6: error: environment variable SOURCE_DATE_EPOCH must expand to a non-negative integer less than or equal to 253402300799fprintf(stderr,"mkyaffs2image: image building tool for YAFFS2 built "__DAT

solution:

三、解决openssl1.1.0导致ssl1.0.版本的代码出错问题

编译uboot时，错误打印信息：

lib/rsa/rsa-sign.c:279:21: error: dereferencing pointer to incomplete type 'RSA {aka struct rsa_st}'if (BN_num_bits(key->e) > 64)^~scripts/Makefile.host:134: recipe for target 'tools/lib/rsa/rsa-sign.o' failed

通过降级openssl解决

sudo apt install libssl1.0-dev

四、遇到问题error: dereferencing pointer to incomplete type 'RSA {aka struct rsa_st}'

下载如下补丁https://github.com/openwrt/openwrt/commit/70b104f98c0657323b28fce140b73a94bf3eb756#diff-ad001f3a51a1d957d5013650f14df0cb保存为tools/mkimage/patches/210-openssl-1.1.x-compat.patch

五、模块 mkimage（u-boot-2014.10） 出错

原因

OpenSSL版本是1.1x，OpenSSL 1.1.x对一些API做了改动，因此出现错误信息。

解决方法

参考 tools: mkimage: fix build with OpenSSL 1.1.x (FS#182) · openwrt/openwrt@70b104f · GitHub

在tools/mkimage/patches/目录下wget210-openssl-1.1.x-compat.patch

如下：

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