Fat runtime

cmake/arch.cmake

@@ -11,7 +11,8 @@ else ()
 endif ()
 
 
-set (CMAKE_REQUIRED_FLAGS "${CMAKE_C_FLAGS} ${EXTRA_C_FLAGS}")
+set (CMAKE_REQUIRED_FLAGS "${CMAKE_C_FLAGS} ${EXTRA_C_FLAGS} ${ARCH_C_FLAGS}")
+
 # ensure we have the minimum of SSSE3 - call a SSSE3 intrinsic
 CHECK_C_SOURCE_COMPILES("#include <${INTRIN_INC_H}>
 int main() {
@@ -19,10 +20,6 @@ int main() {
     (void)_mm_shuffle_epi8(a, a);
 }" HAVE_SSSE3)
 
-if (NOT HAVE_SSSE3)
-    message(FATAL_ERROR "A minimum of SSSE3 compiler support is required")
-endif ()
-
 # now look for AVX2
 CHECK_C_SOURCE_COMPILES("#include <${INTRIN_INC_H}>
 #if !defined(__AVX2__)
@@ -34,9 +31,5 @@ int main(){
     (void)_mm256_xor_si256(z, z);
 }" HAVE_AVX2)
 
-if (NOT HAVE_AVX2)
-    message(STATUS "Building without AVX2 support")
-endif ()
-
 unset (CMAKE_REQUIRED_FLAGS)
 unset (INTRIN_INC_H)

cmake/attrib.cmake

@@ -0,0 +1,3 @@
+# tests for compiler properties
+
+CHECK_C_SOURCE_COMPILES("int foo(int) __attribute__ ((ifunc(\"foo_i\"))); int f1(int i) { return i; } void (*foo_i()) { return f1; } int main(void) { return 0; }" HAS_C_ATTR_IFUNC)

cmake/build_wrapper.sh

@@ -0,0 +1,27 @@
+#!/bin/sh -e
+# This is used for renaming symbols for the fat runtime, don't call directly
+# TODO: make this a lot less fragile!
+PREFIX=$1
+KEEPSYMS_IN=$2
+shift 2
+BUILD=$@
+OUT=$(echo $BUILD | sed 's/.* -o \(.*\.o\).*/\1/')
+SYMSFILE=/tmp/${PREFIX}_rename.syms.$$
+KEEPSYMS=/tmp/keep.syms.$$
+# grab the command without the target obj or src file flags
+# we don't just call gcc directly as there may be flags modifying the arch
+CC_CMD=$(echo $BUILD | sed 's/ -o .*\.o//;s/ -c //;s/ .[^ ]*\.c//;')
+# find me a libc
+LIBC_SO=$(${CC_CMD} --print-file-name=libc.so.6)
+cp ${KEEPSYMS_IN} ${KEEPSYMS}
+# get all symbols from libc and turn them into patterns
+nm -f p -g -D ${LIBC_SO} | sed -s 's/\([^ ]*\).*/^\1$/' >> ${KEEPSYMS}
+# build the object
+${BUILD}
+# rename the symbols in the object
+nm -f p -g ${OUT} | cut -f1 -d' ' | grep -v -f ${KEEPSYMS} | sed -e "s/\(.*\)/\1\ ${PREFIX}_\1/" >> ${SYMSFILE}
+if test -s ${SYMSFILE}
+then
+    objcopy --redefine-syms=${SYMSFILE} ${OUT}
+fi
+rm -f ${SYMSFILE} ${KEEPSYMS}

cmake/config.h.in

@@ -15,6 +15,9 @@
 /* internal build, switch on dump support. */
 #cmakedefine DUMP_SUPPORT
 
+/* Define if building "fat" runtime. */
+#cmakedefine FAT_RUNTIME
+
 /* Define to 1 if `backtrace' works. */
 #cmakedefine HAVE_BACKTRACE
 

cmake/keep.syms.in

@@ -0,0 +1,11 @@
+# names to exclude
+hs_misc_alloc
+hs_misc_free
+hs_free_scratch
+hs_stream_alloc
+hs_stream_free
+hs_scratch_alloc
+hs_scratch_free
+hs_database_alloc
+hs_database_free
+^_