mirror of
https://github.com/kanjitalk755/macemu.git
synced 2024-06-04 12:29:58 +00:00
Fixes for compatibility with older Linux versions
- Check for both -no_pie and -no-pie flags to disable position-independent code. - Use AC_PROG_CC_C99 to force C99 standard.
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@ -218,7 +218,7 @@ if [[ "x$HAVE_I386" = "xyes" ]]; then
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fi
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fi
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dnl Checks for programs.
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dnl Checks for programs.
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AC_PROG_CC
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AC_PROG_CC_C99
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AC_PROG_CC_C_O
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AC_PROG_CC_C_O
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AC_PROG_CPP
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AC_PROG_CPP
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AC_PROG_CXX
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AC_PROG_CXX
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@ -1123,6 +1123,24 @@ AC_TRANSLATE_DEFINE(HAVE_MMAP_VM, "$have_mmap_vm",
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fi dnl HAVE_MMAP_VM
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fi dnl HAVE_MMAP_VM
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dnl Check if we can disable position-independent code
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AC_CACHE_CHECK([for flag to disable position-independent code],
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ac_cv_no_pie, [
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saved_LDFLAGS="$LDFLAGS"
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LDFLAGS="$LDFLAGS -Wl,-no-pie"
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AC_LINK_IFELSE([AC_LANG_PROGRAM()],[
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ac_cv_no_pie="-no-pie"],[
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LDFLAGS="$saved_LDFLAGS -Wl,-no_pie"
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AC_LINK_IFELSE([AC_LANG_PROGRAM()],[
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ac_cv_no_pie="-no_pie"],[
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ac_cv_no_pie="none"
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])
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])
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if [[ "$ac_cv_no_pie" = "none" ]]; then
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LDFLAGS="$saved_LDFLAGS"
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fi
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])
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dnl Check if we can modify the __PAGEZERO segment for use as Low Memory
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dnl Check if we can modify the __PAGEZERO segment for use as Low Memory
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AC_CACHE_CHECK([whether __PAGEZERO can be Low Memory area 0x0000-0x2000],
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AC_CACHE_CHECK([whether __PAGEZERO can be Low Memory area 0x0000-0x2000],
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ac_cv_pagezero_hack, [
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ac_cv_pagezero_hack, [
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@ -1473,10 +1491,6 @@ if [[ "x$OS_TYPE" = "xdarwin" ]]; then
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fi
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fi
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fi
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fi
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if [[ "x$OS_TYPE" = "xlinux" ]]; then
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LDFLAGS="$LDFLAGS -no-pie"
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fi
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dnl Enable VOSF screen updates with this feature is requested and feasible
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dnl Enable VOSF screen updates with this feature is requested and feasible
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if [[ "x$WANT_VOSF" = "xyes" -a "x$CAN_VOSF" = "xyes" ]]; then
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if [[ "x$WANT_VOSF" = "xyes" -a "x$CAN_VOSF" = "xyes" ]]; then
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AC_DEFINE(ENABLE_VOSF, 1, [Define if using video enabled on SEGV signals.])
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AC_DEFINE(ENABLE_VOSF, 1, [Define if using video enabled on SEGV signals.])
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@ -75,7 +75,7 @@ AC_ARG_ENABLE(sdl-framework-prefix, [ --enable-sdl-framework-prefix=PFX d
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AC_ARG_WITH(sdl1, [ --with-sdl1 use SDL 1.x, rather than SDL 2.x [default=no]], [WANT_SDL_VERSION_MAJOR=1], [])
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AC_ARG_WITH(sdl1, [ --with-sdl1 use SDL 1.x, rather than SDL 2.x [default=no]], [WANT_SDL_VERSION_MAJOR=1], [])
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dnl Checks for programs.
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dnl Checks for programs.
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AC_PROG_CC
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AC_PROG_CC_C99
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AC_PROG_CPP
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AC_PROG_CPP
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AC_PROG_CXX
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AC_PROG_CXX
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AC_PROG_MAKE_SET
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AC_PROG_MAKE_SET
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@ -988,13 +988,19 @@ AC_TRANSLATE_DEFINE(HAVE_MMAP_VM, $have_mmap_vm,
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fi dnl HAVE_MMAP_VM
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fi dnl HAVE_MMAP_VM
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dnl Check if we can disable position-independent code
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dnl Check if we can disable position-independent code
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AC_CACHE_CHECK([how to disable position-independent code],
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AC_CACHE_CHECK([for flag to disable position-independent code],
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ac_cv_no_pie, [
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ac_cv_no_pie, [
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ac_cv_no_pie='-Wl,-no_pie'
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saved_LDFLAGS="$LDFLAGS"
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saved_LDFLAGS="$LDFLAGS"
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LDFLAGS="$LDFLAGS $ac_cv_no_pie"
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LDFLAGS="$LDFLAGS -Wl,-no-pie"
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AC_TRY_LINK(,,,[ac_cv_no_pie="cannot"])
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AC_LINK_IFELSE([AC_LANG_PROGRAM()],[
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if [[ "$ac_cv_no_pie" = "cannot" ]]; then
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ac_cv_no_pie="-no-pie"],[
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LDFLAGS="$saved_LDFLAGS -Wl,-no_pie"
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AC_LINK_IFELSE([AC_LANG_PROGRAM()],[
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ac_cv_no_pie="-no_pie"],[
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ac_cv_no_pie="none"
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])
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])
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if [[ "$ac_cv_no_pie" = "none" ]]; then
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LDFLAGS="$saved_LDFLAGS"
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LDFLAGS="$saved_LDFLAGS"
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fi
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fi
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])
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])
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