dlmalloc.c:1752:44: error: implicit declaration of function ‘mremap’

[Xoooo]

ubutu64@ubutu64:~/lk$ make pc-x86-64-test make[1]: Entering directory '/home/ubutu64/lk' make[2]: Entering directory '/home/ubutu64/lk' PROJECT = pc-x86-64-test PLATFORM = pc TARGET = pc-x86 arch/x86/rules.mk:73: ARCH_x86_TOOLCHAIN_PREFIX = arch/x86/rules.mk:74: ARCH_x86_64_TOOLCHAIN_PREFIX = arch/x86/rules.mk:75: TOOLCHAIN_PREFIX = including app app/shell app/stringtests app/tests dev kernel lib/aes lib/aes/test lib/cbuf lib/cksum lib/debugcommands lib/libm lib/version platform target including kernel/vm lib/console lib/debug lib/heap lib/libc including lib/heap/dlmalloc lib/io LIBGCC = /usr/lib/gcc/x86_64-linux-gnu/5/libgcc.a GLOBAL_COMPILEFLAGS = -g -finline -include ./build-pc-x86-64-test/config.h -W -Wall -Wno-multichar -Wno-unused-parameter -Wno-unused-function -Wno-unused-label -Werror=return-type -fasynchronous-unwind-tables -gdwarf-2 -fno-pic -fno-stack-protector -mcmodel=kernel -mno-red-zone GLOBAL_OPTFLAGS = -O2 generating build-pc-x86-64-test/target/pc-x86/module_config.h generating build-pc-x86-64-test/config.h generating build-pc-x86-64-test/platform/pc/module_config.h generating build-pc-x86-64-test/arch/x86/module_config.h generating build-pc-x86-64-test/top/module_config.h generating build-pc-x86-64-test/app/module_config.h generating build-pc-x86-64-test/app/shell/module_config.h generating build-pc-x86-64-test/app/stringtests/module_config.h generating build-pc-x86-64-test/app/tests/module_config.h generating build-pc-x86-64-test/dev/module_config.h generating build-pc-x86-64-test/kernel/module_config.h generating build-pc-x86-64-test/external/lib/aes/module_config.h generating build-pc-x86-64-test/external/lib/aes/test/module_config.h generating build-pc-x86-64-test/lib/cbuf/module_config.h generating build-pc-x86-64-test/external/lib/cksum/module_config.h generating build-pc-x86-64-test/lib/debugcommands/module_config.h generating build-pc-x86-64-test/external/lib/libm/module_config.h generating build-pc-x86-64-test/srcfiles.txt generating build-pc-x86-64-test/include_paths.txt generating build-pc-x86-64-test/buildid.h build-pc-x86-64-test/buildid.h.tmp build-pc-x86-64-test/buildid.h 不同：第 108 字节，第 3 行 generating build-pc-x86-64-test/lib/version/module_config.h compiling lib/version/version.c linking build-pc-x86-64-test/lib/version.mod.o generating build-pc-x86-64-test/platform/module_config.h generating build-pc-x86-64-test/target/module_config.h generating build-pc-x86-64-test/kernel/vm/module_config.h generating build-pc-x86-64-test/lib/console/module_config.h generating build-pc-x86-64-test/lib/debug/module_config.h generating build-pc-x86-64-test/lib/heap/module_config.h generating build-pc-x86-64-test/lib/libc/module_config.h generating build-pc-x86-64-test/external/lib/heap/dlmalloc/module_config.h compiling external/lib/heap/dlmalloc/dlmalloc.c external/lib/heap/dlmalloc/dlmalloc.c: In function ‘mmap_resize’: external/lib/heap/dlmalloc/dlmalloc.c:1752:44: error: implicit declaration of function ‘mremap’ [-Werror=implicit-function-declaration]

define MREMAP_DEFAULT(addr, osz, nsz, mv) mremap((addr), (osz), (nsz), (mv))

                                        ^

external/lib/heap/dlmalloc/dlmalloc.c:1808:49: note: in expansion of macro ‘MREMAP_DEFAULT’

define CALL_MREMAP(addr, osz, nsz, mv) MREMAP_DEFAULT((addr), (osz), (

                                             ^

external/lib/heap/dlmalloc/dlmalloc.c:3924:23: note: in expansion of macro ‘CALLMREMAP’ char* cp = (char)CALLMREMAP((char)oldp - offset, ^ external/lib/heap/dlmalloc/dlmalloc.c:3924:16: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] char* cp = (char_)CALLMREMAP((char)oldp - offset, ^ external/lib/heap/dlmalloc/dlmalloc.c: In function ‘sys_trim’: external/lib/heap/dlmalloc/dlmalloc.c:4369:62: warning: comparison between pointer and integer if ((CALL_MREMAP(sp->base, sp->size, newsize, 0) != MFAIL) || ^ cc1: some warnings being treated as errors make/compile.mk:41: recipe for target 'build-pc-x86-64-test/external/lib/heap/dlmalloc/dlmalloc.o' failed make[2]: * [build-pc-x86-64-test/external/lib/heap/dlmalloc/dlmalloc.o] Error 1 make[2]: Leaving directory '/home/ubutu64/lk' engine.mk:28: recipe for target 'make-make' failed make[1]: * [make-make] Error 2 make[1]: Leaving directory '/home/ubutu64/lk' makefile:34: recipe for target 'pc-x86-64-test' failed make: *\ [pc-x86-64-test] Error 2

[travisg]

You're using the linux toolchain, which is not supported. I think it's confusing the dlmalloc code, which thinks it is building for linux.

[bingzhux]

yes, looks like toolchain issue, i didn't have this build issue.

[nvll]

Let us know if this or a similar issue persists with the correct toolchain.

[egrimley-arm]

For what it's worth, I was able to build with aarch64-linux-gnu-gcc by inserting #undef linux at the start of external/lib/heap/dlmalloc/dlmalloc.c. Since aarch64-linux-gnu-gcc is part of Debian and Ubuntu, using the wrong toolchain might be easier for some people. See also #195.

[mu578]

that's a classic mixing up OSTYPE platforms with host/target specifics; you should never rely on generic-vendor targets.

[travisg]

Probably fairly harmless to undef the linux thing, though clearly it's a hack. Too bad it's actually set by the compiler. Wonder if it's possible to -Ulinux it on the command line, if the build system detects a linux toolchain...