diff options
| -rw-r--r-- | configure.ac | 22 | ||||
| -rw-r--r-- | src/Makefile.am | 2 | ||||
| -rw-r--r-- | src/lib_proj.cmake | 2 | ||||
| -rw-r--r-- | src/projections/tmerc.cpp | 2 |
4 files changed, 25 insertions, 3 deletions
diff --git a/configure.ac b/configure.ac index fb185a1e..a47ba651 100644 --- a/configure.ac +++ b/configure.ac @@ -125,10 +125,30 @@ if test "$HAVE_GCC_WARNING_ZERO_AS_NULL_POINTER_CONSTANT" = "yes"; then AC_DEFINE_UNQUOTED(HAVE_GCC_WARNING_ZERO_AS_NULL_POINTER_CONSTANT, 1, [Define to 1 if the compiler supports -Wzero-as-null-pointer-constant]) fi - AC_LANG_POP([C++]) dnl --------------------------------------------------------------------------- +dnl Check if __attribute__((target_clones("fma","default"))) works +dnl This is needed for example on Alpine Linux where for some reason, building +dnl such tagged functions fails with 'error: the call requires 'ifunc', which is not supported by this target' +dnl --------------------------------------------------------------------------- + +TARGET_CLONES_FMA_FLAGS="" +AC_MSG_CHECKING([if target_clones_fma works]) +SAVED_CFLAGS="$CFLAGS" +CFLAGS="$CFLAGS -Werror" +AC_COMPILE_IFELSE([AC_LANG_PROGRAM( +[[ +__attribute__((target_clones("fma","default"))) void foo() {} +]])], +[AC_MSG_RESULT([yes])] +[TARGET_CLONES_FMA_FLAGS="-DTARGET_CLONES_FMA_ALLOWED"], +[AC_MSG_RESULT([no])]) +CFLAGS="$SAVED_CFLAGS" +AC_SUBST(TARGET_CLONES_FMA_FLAGS,$TARGET_CLONES_FMA_FLAGS) + + +dnl --------------------------------------------------------------------------- dnl Check for --enable-lto dnl --------------------------------------------------------------------------- diff --git a/src/Makefile.am b/src/Makefile.am index e5f41546..fe816af0 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -7,7 +7,7 @@ check_PROGRAMS = geodtest AM_CPPFLAGS = -DPROJ_LIB=\"$(pkgdatadir)\" \ -DMUTEX_@MUTEX_SETTING@ -I$(top_srcdir)/include @SQLITE3_CFLAGS@ @TIFF_CFLAGS@ @TIFF_ENABLED_FLAGS@ @CURL_CFLAGS@ @CURL_ENABLED_FLAGS@ -AM_CXXFLAGS = @CXX_WFLAGS@ @FLTO_FLAG@ +AM_CXXFLAGS = @CXX_WFLAGS@ @FLTO_FLAG@ @TARGET_CLONES_FMA_FLAGS@ include_HEADERS = proj.h proj_experimental.h proj_constants.h proj_api.h geodesic.h \ proj_symbol_rename.h diff --git a/src/lib_proj.cmake b/src/lib_proj.cmake index 8978e20f..7c93b205 100644 --- a/src/lib_proj.cmake +++ b/src/lib_proj.cmake @@ -301,6 +301,8 @@ source_group("CMake Files" FILES CMakeLists.txt) # Embed PROJ_LIB data files location add_definitions(-DPROJ_LIB="${CMAKE_INSTALL_PREFIX}/${DATADIR}") +add_definitions(-DTARGET_CLONES_FMA_ALLOWED) + ################################################# ## targets: libproj and proj_config.h ################################################# diff --git a/src/projections/tmerc.cpp b/src/projections/tmerc.cpp index 754fe53f..91dad135 100644 --- a/src/projections/tmerc.cpp +++ b/src/projections/tmerc.cpp @@ -61,7 +61,7 @@ struct pj_opaque_exact { // mechanism for that, where the compiler builds a default version, and one that // uses FMA. And at runtimes it figures out automatically which version can be used // by the current CPU. This allows to create general purpose binaries. -#if defined(__GNUC__) && __GNUC__ >= 6 && defined(__x86_64__) && !defined(__FMA__) +#if defined(TARGET_CLONES_FMA_ALLOWED) && defined(__GNUC__) && __GNUC__ >= 6 && defined(__x86_64__) && !defined(__FMA__) #define BUILD_FMA_OPTIMIZED_VERSION #endif |