On Wed, Dec 25, 2013 at 09:21:50PM +0100, Kevin Krammer wrote: > On Wednesday, 2013-12-25, 21:53:10, Muhammad Bashir Al-Noimi wrote: > > Howdy, > > > > How can I use ccache in Qt Creator? Do I need to add something in .pro file? > > You define it as the C and C++ compiler. > > E.g. by setting the CC and CXX environment variables or creating a > specialized > mkspec or by overwriting the QMAKE_CC and QMAKE_CXX variables, etc. > a much nicer way is compiling the attached program, installing gcc/g++/cc/c++/make symlinks in a place where it is found first (i have /usr/local/bin first in PATH, so that's a good place), exporting WRAPCCFLAGS (i have WRAPCCFLAGS=cache,ice=40, because i want caching and have a fairly big icecream farm at hand), and everything just works. always. unless you run into a buildsystem which does not support parallelization or does not like ccache or icecream, then you may need to adjust the flags to disable it.
/* Copyright (C) 2002 Oswald Buddenhagen <[email protected]> Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. Neither the name of the University nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * Usage: * - compile with gcc -O2 -o wrapcc wrapcc3.c * - symlink gcc/g++/cc/c++/make from /usr/local/bin (or anything else that * is in PATH before the actual compiler toolchain) to this executable * - set up WRAPCCFLAGS: * - list of comma-separated flags * - "jobs=n" - pass -jn to make * - "ice=n" - use icecc, and pass -jn to make * - "dist" - use distcc, and pass -jn to make (n determined from DISTCC_HOSTS) * - "cache" - use ccache. It is possible to specify a list of roots with local * caches: cache=/root1=/cachedir1:/root2=/cachedir2. If no roots are given, * the wrapper will look for .ccache/ up the directory hierarchy. If none is * found, ccache's default (~/.ccache/) will be used. * - "append=-suffix" - suffix to append to compiler binary. This makes it * possible to invoke x-compilers without wrapping them explicitly. * * Example: export WRAPCCFLAGS=cache,ice=40 # caching and a big icecream farm */ #define _GNU_SOURCE #include <stdio.h> #include <ctype.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <alloca.h> #include <stdarg.h> #include <limits.h> static void __attribute__((noreturn)) Panic( const char *msg, ... ) { va_list va; va_start( va, msg ); vfprintf( stderr, msg, va ); va_end( va ); exit( 1 ); } static int debug; static void Debug( const char *msg, ... ) { va_list va; if (debug) { va_start( va, msg ); vfprintf( stderr, msg, va ); va_end( va ); } } char * findpath( const char *path, const char *name0 ) { const char *pathe; char *name, *thenam; int len; char nambuf[PATH_MAX+1], resolved[PATH_MAX+1]; static char myself[PATH_MAX+1], directory[PATH_MAX+1]; if (!directory[0] && !getcwd( directory, sizeof(directory) )) Panic( "getcwd failed.\n" ); if (!myself[0]) { if ((unsigned)(len = readlink( "/proc/self/exe", myself, sizeof(myself) )) > PATH_MAX) Panic( "readlen /proc/self/exe failed.\n" ); myself[len] = 0; Debug( "i am %s\n", myself ); } len = strlen( name0 ); name = nambuf + PATH_MAX - len; memcpy( name, name0, len + 1 ); *--name = '/'; do { if (!(pathe = strchr( path, ':' ))) pathe = path + strlen( path ); len = pathe - path; if (!len || (len == 1 && *path == '.')) { len = strlen( directory ); path = directory; } thenam = name - len; if (thenam >= nambuf) { memcpy( thenam, path, len ); if (!realpath( thenam, resolved )) Debug( "%s cannot be resolved\n", thenam ); else if (access( thenam, X_OK )) Debug( "%s is not executable\n", thenam ); else if (!strcmp( resolved, myself )) Debug( "%s is myself\n", thenam ); else { Debug( "%s is %s\n", name0, thenam ); return strdup( thenam ); } } path = pathe; } while (*path++); Panic( "Can't find %s in $PATH.\n", name0 ); } #define NPARTS 2 int main( int argc, char **argv ) { char **nargv = alloca( sizeof(*nargv) * (NPARTS + argc + 1) ); char *p, *p2, *path, *name0, *name1, *env; int nargc = 0, i, cnt; char cc, fc; if (!(env = getenv( "WRAPCCFLAGS" ))) Panic( "%s: WRAPCCFLAGS not set!\n", *argv ); if (strstr( env, "debug" )) debug++; if (!(path = getenv( "PATH" ))) Panic( "$PATH not set.\n" ); name0 = strrchr( *argv, '/' ); if (name0) name0++; else name0 = *argv; Debug( "my name is %s (full %s)\n", name0, *argv ); if (!strcmp( name0, "make" ) || !strcmp( name0, "gmake" )) { static char buf[8]; nargv[nargc++] = findpath( path, name0 ); if (strstr( env, "dist" )) { if ((p = getenv( "DISTCC_HOSTS" ))) { for (cnt = 1; (p2 = strchr( p, ' ' )); cnt++, p = p2 + 1); Debug( "%d compile jobs requested\n", cnt ); if (cnt > 1) { sprintf( buf, "-j%d", cnt ); nargv[nargc++] = buf; } } } else if ((p = strstr( env, "ice=" ))) { cnt = atoi( p + 4 ); goto njobs; } else if ((p = strstr( env, "jobs=" ))) { cnt = atoi( p + 5 ); njobs: Debug( "%d compile jobs requested\n", cnt ); if (cnt > 1) { sprintf( buf, "-j%d", cnt ); nargv[nargc++] = buf; } } if ((p = strstr( env, "cache" ))) { char cwd[PATH_MAX], rcwd[PATH_MAX]; if (getcwd( cwd, sizeof(cwd) ) && realpath( cwd, rcwd )) { Debug("real dir is %s\n", rcwd); if (p[5] == ':') { p += 6; for (;;) { p2 = rcwd; Debug("trying %s\n", p); for (;;) { cc = *p++; fc = *p2++; if (!cc || cc == ',') goto dirdone; if (cc == '=') break; if (cc != fc) goto notdir; } if (!fc || fc == '/') { for (p2 = cwd; (cc = *p++) && cc != ':' && cc != ',';) *p2++ = cc; strcpy( p2, "/.ccache" ); setenv( "CCACHE_DIR", cwd, 1 ); Debug( "setting cache dir to %s\n", cwd ); goto dirdone; } notdir: while ((cc = *p++) && cc != ':') if (!cc || cc == ',') goto dirdone; } dirdone: ; } else { p = rcwd + strlen( rcwd ); do { strcpy( p, "/.ccache" ); if (!access( rcwd, X_OK )) { setenv( "CCACHE_DIR", rcwd, 1 ); Debug( "setting cache dir to %s\n", rcwd ); break; } p = memrchr( rcwd, '/', p - rcwd - 1 ); } while (p && p != rcwd); } } } } else { if (!strchr( name0, '-' ) && (p = strstr( env, "append=" ))) { static char buf[16]; for (p2 = p + 7; *p2 && *p2 != ','; p2++); snprintf( buf, sizeof(buf), "%s-%.*s", name0, (int)(p2 - (p + 7)), p + 7 ); name1 = buf; } else name1 = name0; Debug( "target name is %s\n", name1 ); if (strstr( env, "cache" )) { nargv[nargc++] = findpath( path, "ccache" ); if (strstr( env, "dist" )) { char buf[8]; sprintf( buf, "%d", dup( 2 ) ); setenv( "UNCACHED_ERR_FD", buf, 1 ); setenv( "CCACHE_PREFIX", findpath( path, "distcc" ), 1 ); } else if (strstr( env, "ice" )) { char buf[8]; sprintf( buf, "%d", dup( 2 ) ); setenv( "UNCACHED_ERR_FD", buf, 1 ); setenv( "CCACHE_PREFIX", findpath( path, "icecc" ), 1 ); } } else { if (strstr( env, "dist" )) nargv[nargc++] = findpath( path, "distcc" ); else if (strstr( env, "ice" )) nargv[nargc++] = findpath( path, "icecc" ); } nargv[nargc++] = findpath( path, name1 ); } do { nargv[nargc++] = *++argv; } while (*argv); for (i = 0; nargv[i]; i++) Debug( "%s ", nargv[i] ); Debug( "\n" ); execvp( *nargv, nargv ); Panic( "Cannot exec %s!\n", *nargv ); }
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