1# Check for binary relocation support. 2# Written by Hongli Lai 3# http://autopackage.org/ 4 5AC_DEFUN([AM_BINRELOC], 6[ 7 AC_ARG_ENABLE(binreloc, 8 [ --enable-binreloc compile with binary relocation support 9 (default=enable when available)], 10 enable_binreloc=$enableval,enable_binreloc=auto) 11 12 AC_ARG_ENABLE(binreloc-threads, 13 [ --enable-binreloc-threads compile binary relocation with threads support 14 (default=yes)], 15 enable_binreloc_threads=$enableval,enable_binreloc_threads=yes) 16 17 BINRELOC_CFLAGS= 18 BINRELOC_LIBS= 19 if test "x$enable_binreloc" = "xauto"; then 20 AC_CHECK_FILE([/proc/self/maps]) 21 AC_CACHE_CHECK([whether everything is installed to the same prefix], 22 [br_cv_valid_prefixes], [ 23 if test "$bindir" = '${exec_prefix}/bin' -a "$sbindir" = '${exec_prefix}/sbin' -a \ 24 "$datadir" = '${prefix}/share' -a "$libdir" = '${exec_prefix}/lib' -a \ 25 "$libexecdir" = '${exec_prefix}/libexec' -a "$sysconfdir" = '${prefix}/etc' 26 then 27 br_cv_valid_prefixes=yes 28 else 29 br_cv_valid_prefixes=no 30 fi 31 ]) 32 fi 33 AC_CACHE_CHECK([whether binary relocation support should be enabled], 34 [br_cv_binreloc], 35 [if test "x$enable_binreloc" = "xyes"; then 36 br_cv_binreloc=yes 37 elif test "x$enable_binreloc" = "xauto"; then 38 if test "x$br_cv_valid_prefixes" = "xyes" -a \ 39 "x$ac_cv_file__proc_self_maps" = "xyes"; then 40 br_cv_binreloc=yes 41 else 42 br_cv_binreloc=no 43 fi 44 else 45 br_cv_binreloc=no 46 fi]) 47 48 if test "x$br_cv_binreloc" = "xyes"; then 49 BINRELOC_CFLAGS="-DENABLE_BINRELOC" 50 AC_DEFINE(ENABLE_BINRELOC,,[Use binary relocation?]) 51 if test "x$enable_binreloc_threads" = "xyes"; then 52 AC_CHECK_LIB([pthread], [pthread_getspecific]) 53 fi 54 55 AC_CACHE_CHECK([whether binary relocation should use threads], 56 [br_cv_binreloc_threads], 57 [if test "x$enable_binreloc_threads" = "xyes"; then 58 if test "x$ac_cv_lib_pthread_pthread_getspecific" = "xyes"; then 59 br_cv_binreloc_threads=yes 60 else 61 br_cv_binreloc_threads=no 62 fi 63 else 64 br_cv_binreloc_threads=no 65 fi]) 66 67 if test "x$br_cv_binreloc_threads" = "xyes"; then 68 BINRELOC_LIBS="-lpthread" 69 AC_DEFINE(BR_PTHREAD,1,[Include pthread support for binary relocation?]) 70 else 71 BINRELOC_CFLAGS="$BINRELOC_CFLAGS -DBR_PTHREADS=0" 72 AC_DEFINE(BR_PTHREAD,0,[Include pthread support for binary relocation?]) 73 fi 74 fi 75 AC_SUBST(BINRELOC_CFLAGS) 76 AC_SUBST(BINRELOC_LIBS) 77]) 78