Gcc may use variable for that like $GCC_TARGET_HEADERS=path1;path2. However gcc does nothing if variable empty. Fiodar Stryzhniou исходное сбщ Тема: Re: What is the best way to add a target specific system header directory От: Xi Ruoyao <ryxi@xxxxxxxxxxxxxxxxx> Дата: 09.05.2017 07.04 On 2017-05-08 19:46 +0100, Martin J. O'Riordan wrote: > I am building GCC as a cross compiler for the Sparc Leon processor, it has > been working well for me for several years and is currently at v6.3.0. > > However, a recent change I want to make is to provide an additional > non-standard system header directory to be searched when '<...>' is used, > and this directory is located relative to the 'gcc' binary; in this case > relative to: > > <wherever>/bin/triple-gcc So you have to determine where the executable triple-gcc is. For linux we should readlink /proc/self/exe, but it's not portable. > I have tried using '--with-native-system-header-dir' but this wants an > absolute path. I want to avoid redefining 'INCLUDE_DEFAULTS' with my own > custom replacement. Substituting for '/usr/include' is okay too, because > the host version is not meaningful the context of cross compilation. > > Any recommendations on how to configure for this, or should I add something > (a '#define' for example) to 'gcc/gcc/config/sparc/sparc.h'? It seems GCC doesn't have this functionality. I think we have to implement this ourselves. > Thanks, > > MartinO > > -- Xi Ruoyao <ryxi@xxxxxxxxxxxxxxxxx> School of Aerospace Science and Technology, Xidian University
