diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 82 |
1 files changed, 77 insertions, 5 deletions
diff --git a/configure.ac b/configure.ac index 535aac9..7342276 100644 --- a/configure.ac +++ b/configure.ac @@ -1,7 +1,8 @@ AC_INIT(gwm, 0.0, gtw@gnu.org) +AC_PREREQ([2.60]) AC_CONFIG_SRCDIR(gwm.c) AM_INIT_AUTOMAKE -AC_CONFIG_FILES(Makefile) +AC_CONFIG_FILES(Makefile gwm.ld) AC_CONFIG_HEADERS(config.h) if test -f config.options; then @@ -42,7 +43,6 @@ AC_DEFUN([GWM_OPTIONAL_PACKAGE],[ fi ]) -AC_DEFINE(_GNU_SOURCE, 1, [Enable GNU extensions on systems that have them.]) AH_BOTTOM([/* If we haven't been told that we're debugging, assume we aren't. */ #ifndef DEBUG #define NDEBUG 1 @@ -50,6 +50,7 @@ AH_BOTTOM([/* If we haven't been told that we're debugging, assume we aren't. */ # Checks for programs: AC_PROG_CC +AC_USE_SYSTEM_EXTENSIONS PKG_PROG_PKG_CONFIG # Checks for libraries: @@ -79,7 +80,7 @@ AM_CONDITIONAL(RENDER, [test x$gwm_found_render = xyes]) AC_SEARCH_LIBS(iconv, iconv) # Checks for header files: -AC_CHECK_HEADERS(iconv.h mcheck.h poll.h) +AC_CHECK_HEADERS(iconv.h mcheck.h sys/mman.h poll.h sys/param.h) # Checks for types: AC_TYPE_UINT64_T @@ -87,8 +88,79 @@ AC_TYPE_UINT64_T # Checks for functions: AC_CHECK_FUNCS(iconv mtrace ppoll) -PKG_CFLAGS=`$PKG_CONFIG --cflags $gwm_packages` -PKG_LIBS=`$PKG_CONFIG --libs $gwm_packages` +# Check for a reasonable section alignment to pass to the linker. First, +# try looking for typical compile-time constants in system header files... +AC_MSG_CHECKING([linker section alignment]) +gwm_align=512 +gwm_found_align=no +while test $gwm_align -le 65536; do + AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ +#if HAVE_SYS_PARAM_H +#include <sys/param.h> +#endif +#if HAVE_UNISTD_H +#include <unistd.h> +#endif + +#if EXEC_PAGESIZE == ]] $gwm_align [[ || PAGE_SIZE == ]] $gwm_align [[ || PAGESIZE == ]] $gwm_align [[ +int main() { return 0; } +#else +Failure. +#endif +]])], [gwm_found_align=yes; break], []) + gwm_align=$(expr $gwm_align \* 2) +done +if test $gwm_found_align = no; then + # No luck so far... + if test $cross_compiling != yes; then + for gwm_prog in pagesize "getconf PAGE_SIZE"; do + if $gwm_prog > /dev/null 2>&1; then + gwm_align=512 + gwm_found_align=no + while test $gwm_align -le 65536; do + if test $($gwm_prog 2> /dev/null) = $gwm_align; then + gwm_found_align=yes + break + fi + gwm_align=$(expr $gwm_align \* 2) + done + if test $gwm_found_align = yes; then break; fi + fi + done + fi +fi +if test $gwm_found_align = no; then + gwm_align=4096 # complete guess +fi +AC_MSG_RESULT([$gwm_align]) +SECTION_ALIGN=$gwm_align +AC_SUBST(SECTION_ALIGN) + +AC_MSG_CHECKING([for linker script support]) +gwm_ldflags="$LDFLAGS" +LDFLAGS="$LDFLAGS -Wl,-Tconftest.ld" +cat > conftest.ld <<EOF +SECTIONS +{ + init_start = .; + .gwminit.text : { init*(.text ) } + .gwminit.rodata : { init*(.rodata ) } + init_end = .; +} +INSERT AFTER .text; +EOF +AC_LINK_IFELSE([AC_LANG_SOURCE([[ +extern char init_start, init_end; +int main() { (void) ( &init_end - &init_start ); return 0; } +]])], [gwm_linker_scripts=yes + AC_DEFINE(HAVE_INIT_SECTION, 1) + AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no)]) +LDFLAGS="$gwm_ldflags" +AM_CONDITIONAL(LINKER_SCRIPTS, [test x$gwm_linker_scripts = xyes]) +AH_TEMPLATE(HAVE_INIT_SECTION,[Define if the linker supports scripts (used to locate the init section).]) + +PKG_CFLAGS=$($PKG_CONFIG --cflags $gwm_packages) +PKG_LIBS=$($PKG_CONFIG --libs $gwm_packages) AC_SUBST(PKG_CFLAGS) AC_SUBST(PKG_LIBS) |