Add configure tests for CFLAGS settings.
Add configure test for __asm__ syntax. Add configure test for __attribute__ syntax.
This commit is contained in:
Jason Evans
parent
b8f0a65173
commit
f3340ca8d5
@ -1,6 +1,45 @@
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dnl Process this file with autoconf to produce a configure script.
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AC_INIT([Makefile.in])
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dnl ============================================================================
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dnl Custom macro definitions.
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dnl JE_CFLAGS_APPEND(cflag)
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AC_DEFUN([JE_CFLAGS_APPEND],
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[
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AC_MSG_CHECKING([whether compiler supports $1])
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TCFLAGS="${CFLAGS}"
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if test "x${CFLAGS}" = "x" ; then
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CFLAGS="$1"
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else
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CFLAGS="${CFLAGS} $1"
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fi
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AC_RUN_IFELSE([AC_LANG_PROGRAM(
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[[
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]], [[
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return 0;
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]])],
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AC_MSG_RESULT([yes]),
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AC_MSG_RESULT([no])
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[CFLAGS="${TCFLAGS}"]
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)
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])
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dnl JE_COMPILABLE(label, hcode, mcode, rvar)
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AC_DEFUN([JE_COMPILABLE],
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[
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AC_MSG_CHECKING([whether $1 is compilable])
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AC_RUN_IFELSE([AC_LANG_PROGRAM(
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[$2], [$3])],
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AC_MSG_RESULT([yes])
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[$4="yes"],
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AC_MSG_RESULT([no])
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[$4="no"]
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)
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])
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dnl ============================================================================
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srcroot=$srcdir
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if test "x${srcroot}" = "x." ; then
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srcroot=""
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@ -44,23 +83,22 @@ AC_SUBST([MANDIR])
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cfgoutputs="Makefile doc/jemalloc.3"
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cfghdrs="src/jemalloc_defs.h"
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dnl If CFLAGS isn't defined and using gcc, set CFLAGS to something reasonable.
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dnl Otherwise, just prevent autoconf from molesting CFLAGS.
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dnl If CFLAGS isn't defined, set CFLAGS to something reasonable. Otherwise,
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dnl just prevent autoconf from molesting CFLAGS.
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CFLAGS=$CFLAGS
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AC_PROG_CC
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if test "x$CFLAGS" = "x" ; then
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no_CFLAGS="yes"
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fi
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if test "x$no_CFLAGS" = "xyes" -a "x$GCC" = "xyes" ; then
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CFLAGS="-std=gnu99 -Wall -pipe -g3"
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JE_CFLAGS_APPEND([-std=gnu99])
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JE_CFLAGS_APPEND([-Wall])
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JE_CFLAGS_APPEND([-pipe])
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JE_CFLAGS_APPEND([-g3])
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JE_CFLAGS_APPEND([-march=native])
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JE_CFLAGS_APPEND([-ftls-model=initial-exec])
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fi
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dnl Append EXTRA_CFLAGS to CFLAGS, if defined.
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if test "x$EXTRA_CFLAGS" != "x" ; then
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CFLAGS="$CFLAGS $EXTRA_CFLAGS"
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fi
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dnl XXX These flags only work with newer versions of gcc.
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if test "x$GCC" = "xyes" ; then
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CFLAGS="${CFLAGS} -march=native -ftls-model=initial-exec"
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JE_CFLAGS_APPEND([$EXTRA_CFLAGS])
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fi
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AC_PROG_CPP
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@ -82,16 +120,34 @@ case "${host_cpu}" in
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i[[345]]86)
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;;
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i686)
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CPU_SPINWAIT='__asm__ volatile("pause")'
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JE_COMPILABLE([__asm__], [], [[__asm__ volatile("pause"); return 0;]],
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[asm])
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if test "x${asm}" = "xyes" ; then
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CPU_SPINWAIT='__asm__ volatile("pause")'
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fi
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;;
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x86_64)
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CPU_SPINWAIT='__asm__ volatile("pause")'
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JE_COMPILABLE([__asm__ syntax], [],
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[[__asm__ volatile("pause"); return 0;]], [asm])
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if test "x${asm}" = "xyes" ; then
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CPU_SPINWAIT='__asm__ volatile("pause")'
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fi
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;;
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*)
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;;
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esac
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AC_DEFINE_UNQUOTED([CPU_SPINWAIT], [$CPU_SPINWAIT])
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JE_COMPILABLE([__attribute__ syntax],
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[static __attribute__((unused)) void foo(void){}],
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[],
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[attribute])
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if test "x${attribute}" = "xyes" ; then
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AC_DEFINE_UNQUOTED([JEMALLOC_UNUSED], [__attribute__((unused))])
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else
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AC_DEFINE_UNQUOTED([JEMALLOC_UNUSED], [])
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fi
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dnl Platform-specific settings. abi and RPATH can probably be determined
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dnl programmatically, but doing so is error-prone, which makes it generally
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dnl not worth the trouble.
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@ -197,10 +253,16 @@ AC_SUBST([enable_debug])
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dnl Only optimize if not debugging.
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if test "x$enable_debug" = "x0" -a "x$no_CFLAGS" = "xyes" ; then
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dnl Make sure that an optimization flag was not specified in EXTRA_CFLAGS.
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if test "x$GCC" = "xyes" ; then
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echo "$EXTRA_CFLAGS" | grep "\-O" >/dev/null || CFLAGS="$CFLAGS -O3 -funroll-loops -fomit-frame-pointer"
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else
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echo "$EXTRA_CFLAGS" | grep "\-O" >/dev/null || CFLAGS="$CFLAGS -O"
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optimize="no"
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echo "$EXTRA_CFLAGS" | grep "\-O" >/dev/null || optimize="yes"
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if test "x${optimize}" = "xyes" ; then
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if test "x$GCC" = "xyes" ; then
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JE_CFLAGS_APPEND([-O3])
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JE_CFLAGS_APPEND([-funroll-loops])
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JE_CFLAGS_APPEND([-fomit-frame-pointer])
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else
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JE_CFLAGS_APPEND([-O])
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fi
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fi
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fi
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@ -1799,7 +1799,7 @@ extent_szad_comp(extent_node_t *a, extent_node_t *b)
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}
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/* Wrap red-black tree macros in functions. */
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rb_wrap(static __attribute__((unused)), extent_tree_szad_, extent_tree_t, extent_node_t,
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rb_wrap(static JEMALLOC_UNUSED, extent_tree_szad_, extent_tree_t, extent_node_t,
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link_szad, extent_szad_comp)
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#endif
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@ -1813,7 +1813,7 @@ extent_ad_comp(extent_node_t *a, extent_node_t *b)
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}
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/* Wrap red-black tree macros in functions. */
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rb_wrap(static __attribute__((unused)), extent_tree_ad_, extent_tree_t, extent_node_t, link_ad,
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rb_wrap(static JEMALLOC_UNUSED, extent_tree_ad_, extent_tree_t, extent_node_t, link_ad,
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extent_ad_comp)
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/*
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@ -2361,7 +2361,7 @@ arena_chunk_comp(arena_chunk_t *a, arena_chunk_t *b)
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}
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/* Wrap red-black tree macros in functions. */
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rb_wrap(static __attribute__((unused)), arena_chunk_tree_dirty_, arena_chunk_tree_t,
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rb_wrap(static JEMALLOC_UNUSED, arena_chunk_tree_dirty_, arena_chunk_tree_t,
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arena_chunk_t, link_dirty, arena_chunk_comp)
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static inline int
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@ -2377,7 +2377,7 @@ arena_run_comp(arena_chunk_map_t *a, arena_chunk_map_t *b)
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}
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/* Wrap red-black tree macros in functions. */
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rb_wrap(static __attribute__((unused)), arena_run_tree_, arena_run_tree_t, arena_chunk_map_t,
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rb_wrap(static JEMALLOC_UNUSED, arena_run_tree_, arena_run_tree_t, arena_chunk_map_t,
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link, arena_run_comp)
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static inline int
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@ -2409,7 +2409,7 @@ arena_avail_comp(arena_chunk_map_t *a, arena_chunk_map_t *b)
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}
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/* Wrap red-black tree macros in functions. */
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rb_wrap(static __attribute__((unused)), arena_avail_tree_, arena_avail_tree_t,
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rb_wrap(static JEMALLOC_UNUSED, arena_avail_tree_, arena_avail_tree_t,
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arena_chunk_map_t, link, arena_avail_comp)
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static inline void *
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@ -42,6 +42,13 @@
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*/
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#undef CPU_SPINWAIT
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/*
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* Attribute with which to mark potentially unused functions. For gcc this is:
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*
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* __attribute__((unused))
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*/
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#undef JEMALLOC_UNUSED
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/*
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* JEMALLOC_DEBUG enables assertions and other sanity checks, and disables
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* inline functions.
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