+ if test "x$drm_cv_atomic_primitives" = "xlibatomic-ops"; then
+ AC_DEFINE(HAVE_LIB_ATOMIC_OPS, 1, [Enable if you have libatomic-ops-dev installed])
+ fi
+
+ if test "x$drm_cv_atomic_primitives" = "xnone"; then
+ if test "x$INTEL" != "xauto"; then
+ if test "x$INTEL" != "xno"; then
+ AC_MSG_ERROR([libdrm_intel depends upon atomic operations, which were not found for your compiler/cpu. Try compiling with -march=native, or install the libatomics-op-dev package, or, failing both of those, disable support for Intel GPUs by passing --disable-intel to ./configure])
+ fi
+ else
+ AC_MSG_WARN([Disabling libdrm_intel. It depends on atomic operations, which were not found for your compiler/cpu. Try compiling with -march=native, or install the libatomics-op-dev package.])
+ INTEL=no
+ fi
+ if test "x$RADEON" != "xauto"; then
+ if test "x$RADEON" != "xno"; then
+ AC_MSG_ERROR([libdrm_radeon depends upon atomic operations, which were not found for your compiler/cpu. Try compiling with -march=native, or install the libatomics-op-dev package, or, failing both of those, disable support for Radeon support by passing --disable-radeon to ./configure])
+ fi
+ else
+ AC_MSG_WARN([Disabling libdrm_radeon. It depends on atomic operations, which were not found for your compiler/cpu. Try compiling with -march=native, or install the libatomics-op-dev package.])
+ RADEON=no
+ fi
+ if test "x$NOUVEAU" != "xauto"; then
+ if test "x$NOUVEAU" != "xno"; then
+ AC_MSG_ERROR([libdrm_nouveau depends upon atomic operations, which were not found for your compiler/cpu. Try compiling with -march=native, or install the libatomics-op-dev package, or, failing both of those, disable support for NVIDIA GPUs by passing --disable-nouveau to ./configure])
+ fi
+ else
+ AC_MSG_WARN([Disabling libdrm_nouveau. It depends on atomic operations, which were not found for your compiler/cpu. Try compiling with -march=native, or install the libatomics-op-dev package.])
+ NOUVEAU=no
+ fi
+ else
+ if test "x$INTEL" != "xno"; then
+ case $host_cpu in
+ i?86|x86_64) INTEL=yes ;;
+ *) INTEL=no ;;
+ esac
+ fi
+ if test "x$RADEON" != "xno"; then
+ RADEON=yes
+ fi
+ if test "x$NOUVEAU" != "xno"; then
+ NOUVEAU=yes
+ fi
+ fi
+fi
+
+if test "x$VIGS" != "xno"; then
+ AC_DEFINE(HAVE_VIGS, 1, [Have VIGS])
+fi
+
+if test "x$INTEL" != "xno"; then
+ PKG_CHECK_MODULES(PCIACCESS, [pciaccess >= 0.10])
+fi
+AC_SUBST(PCIACCESS_CFLAGS)
+AC_SUBST(PCIACCESS_LIBS)
+
+PKG_CHECK_MODULES(VALGRIND, [valgrind], [have_valgrind=yes], [have_valgrind=no])
+if test "x$have_valgrind" = "xyes"; then
+ AC_DEFINE([HAVE_VALGRIND], 1, [Use valgrind intrinsics to suppress false warnings])
+fi
+
+AM_CONDITIONAL(HAVE_INTEL, [test "x$INTEL" != "xno"])
+AM_CONDITIONAL(HAVE_RADEON, [test "x$RADEON" != "xno"])
+AM_CONDITIONAL(HAVE_NOUVEAU, [test "x$NOUVEAU" != "xno"])
+if test "x$RADEON" = xyes; then
+ AC_DEFINE(HAVE_RADEON, 1, [Have radeon support])
+fi
+AM_CONDITIONAL(HAVE_VIGS, [test "x$VIGS" != "xno"])
+
+AC_ARG_WITH([kernel-source],
+ [AS_HELP_STRING([--with-kernel-source],
+ [specify path to linux kernel source])],
+ [kernel_source="$with_kernel_source"])
+AC_SUBST(kernel_source)
+
+dnl Add flags for gcc and g++
+if test "x$GCC" = xyes; then
+ # Enable -fvisibility=hidden if using a gcc that supports it
+ save_CFLAGS="$CFLAGS"
+ AC_MSG_CHECKING([whether $CC supports -fvisibility=hidden])
+ VISIBILITY_CFLAGS="-fvisibility=hidden"
+ CFLAGS="$CFLAGS $VISIBILITY_CFLAGS"
+ AC_LINK_IFELSE([AC_LANG_PROGRAM()], AC_MSG_RESULT([yes]),
+ [VISIBILITY_CFLAGS=""; AC_MSG_RESULT([no])]);
+
+ # Restore CFLAGS; VISIBILITY_CFLAGS are added to it where needed.
+ CFLAGS=$save_CFLAGS
+
+ if test "x$VISIBILITY_CFLAGS" != x; then
+ AC_DEFINE(HAVE_VISIBILITY, 1, [Compiler has -fvisibility support])
+ fi
+
+ AC_SUBST([VISIBILITY_CFLAGS])