On Sat, 2020-07-11 at 11:28 +0000, John Frankish via lfs-dev wrote: > A couple of errors found: > > Chapter 6. Cross Compiling Temporary Tools > 6.7. File-5.39 > > Building gives the error: > > Cannot use the installed version of file (5.37) to > cross-compile file 5.39 > Please install file 5.39 locally first > > ..fixed by updating file on the host.
When faking cross compilation, and using the instructions in the book (that is, not passing --build=$(./config.guess)), the build system is aware that it can use the just built file to compile the "magic" file, and so it does... If doing a true cross compilation, this error will occur; two solutions: - as you did, update file on host - first compile a local "file" executable, similarly to what is done with ncurses (see Also what Xi Ruoyao has said about that, his mail arrived while I was writing this one) Note that we cannot change Makefile.am and use autoreconf, because we do not require autotools on the host. > > Chapter 6. Cross Compiling Temporary Tools > 6.10. Grep-3.4 > > Building pulls in a dep on libpcre from the host, which causes > problems later, but can be fixed with "--disable-perl-regexp" Normally, this shouldn't happen: configure makes two tests, one is using pkg-config to find libpcre, the second is testing whether some function from the library can be called. The second one should fail in a cross-compiling environment, if sysroot is correctly set. (creating a fake pkg-config as suggested by Xi Ruoyao shouldn't be needed, at least if compiling on x86 for x86) > > Also, but probably out of scope, > > Chapter 5. Compiling a Cross-Toolchain > 5.5. Glibc-2.31 > > Fails for arm (RPi) with a long double error fixed with an upstream > patch: > > https://sourceware.org/pipermail/glibc-cvs/2020q1/069150.html We may want to make chapter 5/6 more compatible with a general cross- compilation environment (at least x86->arm). I cannot look at that ATM. Pierre -- http://lists.linuxfromscratch.org/listinfo/lfs-dev FAQ: http://www.linuxfromscratch.org/faq/ Unsubscribe: See the above information page
