Fix build with LTO on GCC

5 files changed, 77 insertions, 48 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 686c0f1..56b4a83 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -253,6 +253,15 @@ else()
                 set(SSE4FLAG "-msse4")
                 set(PCLMULFLAG "-mpclmul")
             endif()
+            # Check whether -fno-lto is available
+            set(CMAKE_REQUIRED_FLAGS "-fno-lto")
+            check_c_source_compiles(
+                "int main() { return 0; }"
+                FNO_LTO_AVAILABLE FAIL_REGEX "not supported")
+            set(CMAKE_REQUIRED_FLAGS)
+            if(FNO_LTO_AVAILABLE)
+                set(NOLTOFLAG "-fno-lto")
+            endif()
         endif()
     endif()
 endif()
@@ -645,7 +654,7 @@ if(WITH_OPTIM)
         if(WITH_ACLE AND NOT MSVC)
             add_definitions(-DARM_ACLE_CRC_HASH)
             set(ACLE_SRCS ${ARCHDIR}/crc32_acle.c ${ARCHDIR}/insert_string_acle.c)
-            set_property(SOURCE ${ACLE_SRCS} PROPERTY COMPILE_FLAGS "${ACLEFLAG}")
+            set_property(SOURCE ${ACLE_SRCS} PROPERTY COMPILE_FLAGS "${ACLEFLAG} ${NOLTOFLAG}")
             list(APPEND ZLIB_ARCH_SRCS ${ACLE_SRCS})
             add_feature_info(ACLE_CRC 1 "Support ACLE optimized CRC hash generation, using \"${ACLEFLAG}\"")
         endif()
@@ -653,7 +662,7 @@ if(WITH_OPTIM)
             add_definitions(-DARM_NEON_ADLER32 -DARM_NEON_CHUNKSET -DARM_NEON_SLIDEHASH)
             set(NEON_SRCS ${ARCHDIR}/adler32_neon.c ${ARCHDIR}/chunkset_neon.c ${ARCHDIR}/slide_neon.c)
             list(APPEND ZLIB_ARCH_SRCS ${NEON_SRCS})
-            set_property(SOURCE ${NEON_SRCS} PROPERTY COMPILE_FLAGS "${NEONFLAG}")
+            set_property(SOURCE ${NEON_SRCS} PROPERTY COMPILE_FLAGS "${NEONFLAG} ${NOLTOFLAG}")
             if(MSVC)
                 add_definitions(-D__ARM_NEON__)
             endif()
@@ -670,7 +679,7 @@ if(WITH_OPTIM)
             list(APPEND ZLIB_ARCH_SRCS ${ARCHDIR}/power.c)
             set(POWER8_SRCS ${ARCHDIR}/adler32_power8.c ${ARCHDIR}/slide_hash_power8.c)
             list(APPEND ZLIB_ARCH_SRCS ${POWER8_SRCS})
-            set_property(SOURCE ${POWER8_SRCS} PROPERTY COMPILE_FLAGS "${POWER8FLAG}")
+            set_property(SOURCE ${POWER8_SRCS} PROPERTY COMPILE_FLAGS "${POWER8FLAG} ${NOLTOFLAG}")
         endif()
     elseif(BASEARCH_S360_FOUND)
         if(WITH_DFLTCC_DEFLATE OR WITH_DFLTCC_INFLATE)
@@ -703,14 +712,14 @@ if(WITH_OPTIM)
             list(APPEND AVX2_SRCS ${ARCHDIR}/adler32_avx.c)
             add_feature_info(AVX2_ADLER32 1 "Support AVX2-accelerated adler32, using \"${AVX2FLAG}\"")
             list(APPEND ZLIB_ARCH_SRCS ${AVX2_SRCS})
-            set_property(SOURCE ${AVX2_SRCS} PROPERTY COMPILE_FLAGS "${AVX2FLAG}")
+            set_property(SOURCE ${AVX2_SRCS} PROPERTY COMPILE_FLAGS "${AVX2FLAG} ${NOLTOFLAG}")
         endif()
         if(WITH_SSE4 AND (HAVE_SSE42CRC_INLINE_ASM OR HAVE_SSE42CRC_INTRIN))
             add_definitions(-DX86_SSE42_CRC_HASH)
             set(SSE42_SRCS ${ARCHDIR}/insert_string_sse.c)
             add_feature_info(SSE42_CRC 1 "Support SSE4.2 optimized CRC hash generation, using \"${SSE4FLAG}\"")
             list(APPEND ZLIB_ARCH_SRCS ${SSE42_SRCS})
-            set_property(SOURCE ${SSE42_SRCS} PROPERTY COMPILE_FLAGS "${SSE4FLAG}")
+            set_property(SOURCE ${SSE42_SRCS} PROPERTY COMPILE_FLAGS "${SSE4FLAG} ${NOLTOFLAG}")
             if(HAVE_SSE42CRC_INTRIN)
                 add_definitions(-DX86_SSE42_CRC_INTRIN)
             endif()
@@ -720,14 +729,14 @@ if(WITH_OPTIM)
             set(SSE42_SRCS ${ARCHDIR}/compare258_sse.c)
             add_feature_info(SSE42_COMPARE258 1 "Support SSE4.2 optimized compare258, using \"${SSE4FLAG}\"")
             list(APPEND ZLIB_ARCH_SRCS ${SSE42_SRCS})
-            set_property(SOURCE ${SSE42_SRCS} PROPERTY COMPILE_FLAGS "${SSE4FLAG}")
+            set_property(SOURCE ${SSE42_SRCS} PROPERTY COMPILE_FLAGS "${SSE4FLAG} ${NOLTOFLAG}")
         endif()
         if(WITH_SSE2 AND HAVE_SSE2_INTRIN)
             add_definitions(-DX86_SSE2 -DX86_SSE2_CHUNKSET -DX86_SSE2_SLIDEHASH)
             set(SSE2_SRCS ${ARCHDIR}/chunkset_sse.c ${ARCHDIR}/slide_sse.c)
             list(APPEND ZLIB_ARCH_SRCS ${SSE2_SRCS})
             if(NOT ${ARCH} MATCHES "x86_64")
-                set_property(SOURCE ${SSE2_SRCS} PROPERTY COMPILE_FLAGS "${SSE2FLAG}")
+                set_property(SOURCE ${SSE2_SRCS} PROPERTY COMPILE_FLAGS "${SSE2FLAG} ${NOLTOFLAG}")
                 add_feature_info(FORCE_SSE2 FORCE_SSE2 "Assume CPU is SSE2 capable")
                 if(FORCE_SSE2)
                     add_definitions(-DX86_NOCHECK_SSE2)
@@ -739,14 +748,14 @@ if(WITH_OPTIM)
             set(SSSE3_SRCS ${ARCHDIR}/adler32_ssse3.c)
             add_feature_info(SSSE3_ADLER32 1 "Support SSSE3-accelerated adler32, using \"${SSSE3FLAG}\"")
             list(APPEND ZLIB_ARCH_SRCS ${SSSE3_SRCS})
-            set_property(SOURCE ${SSSE3_SRCS} PROPERTY COMPILE_FLAGS "${SSSE3FLAG}")
+            set_property(SOURCE ${SSSE3_SRCS} PROPERTY COMPILE_FLAGS "${SSSE3FLAG} ${NOLTOFLAG}")
         endif()
         if(WITH_PCLMULQDQ AND HAVE_PCLMULQDQ_INTRIN AND WITH_SSSE3 AND WITH_SSE4)
             add_definitions(-DX86_PCLMULQDQ_CRC)
             set(PCLMULQDQ_SRCS ${ARCHDIR}/crc_folding.c)
             add_feature_info(PCLMUL_CRC 1 "Support CRC hash generation using PCLMULQDQ, using \"${SSSE3FLAG} ${SSE4FLAG} ${PCLMULFLAG}\"")
             list(APPEND ZLIB_ARCH_SRCS ${PCLMULQDQ_SRCS})
-            set_property(SOURCE ${PCLMULQDQ_SRCS} PROPERTY COMPILE_FLAGS "${SSSE3FLAG} ${SSE4FLAG} ${PCLMULFLAG}")
+            set_property(SOURCE ${PCLMULQDQ_SRCS} PROPERTY COMPILE_FLAGS "${SSSE3FLAG} ${SSE4FLAG} ${PCLMULFLAG} ${NOLTOFLAG}")
         endif()
     endif()
 endif()
diff --git a/arch/arm/Makefile.in b/arch/arm/Makefile.in
index a728d5a..d383ba0 100644
--- a/arch/arm/Makefile.in
+++ b/arch/arm/Makefile.in
@@ -6,9 +6,11 @@ CC=
 CFLAGS=
 SFLAGS=
 INCLUDES=
+SUFFIX=
+
 ACLEFLAG=
 NEONFLAG=
-SUFFIX=
+NOLTOFLAG=
 
 SRCDIR=.
 SRCTOP=../..
@@ -23,10 +25,10 @@ all: \
 	insert_string_acle.o insert_string_acle.lo
 
 adler32_neon.o:
-	$(CC) $(CFLAGS) $(NEONFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/adler32_neon.c
+	$(CC) $(CFLAGS) $(NEONFLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/adler32_neon.c
 
 adler32_neon.lo:
-	$(CC) $(SFLAGS) $(NEONFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/adler32_neon.c
+	$(CC) $(SFLAGS) $(NEONFLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/adler32_neon.c
 
 armfeature.o:
 	$(CC) $(CFLAGS) $(INCLUDES) -c -o $@ $(SRCDIR)/armfeature.c
@@ -35,28 +37,28 @@ armfeature.lo:
 	$(CC) $(SFLAGS) $(INCLUDES) -c -o $@ $(SRCDIR)/armfeature.c
 
 chunkset_neon.o:
-	$(CC) $(CFLAGS) $(NEONFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/chunkset_neon.c
+	$(CC) $(CFLAGS) $(NEONFLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/chunkset_neon.c
 
 chunkset_neon.lo:
-	$(CC) $(SFLAGS) $(NEONFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/chunkset_neon.c
+	$(CC) $(SFLAGS) $(NEONFLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/chunkset_neon.c
 
 crc32_acle.o:
-	$(CC) $(CFLAGS) $(ACLEFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/crc32_acle.c
+	$(CC) $(CFLAGS) $(ACLEFLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/crc32_acle.c
 
 crc32_acle.lo:
-	$(CC) $(SFLAGS) $(ACLEFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/crc32_acle.c
+	$(CC) $(SFLAGS) $(ACLEFLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/crc32_acle.c
 
 slide_neon.o:
-	$(CC) $(CFLAGS) $(NEONFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/slide_neon.c
+	$(CC) $(CFLAGS) $(NEONFLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/slide_neon.c
 
 slide_neon.lo:
-	$(CC) $(SFLAGS) $(NEONFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/slide_neon.c
+	$(CC) $(SFLAGS) $(NEONFLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/slide_neon.c
 
 insert_string_acle.o:
-	$(CC) $(CFLAGS) $(ACLEFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/insert_string_acle.c
+	$(CC) $(CFLAGS) $(ACLEFLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/insert_string_acle.c
 
 insert_string_acle.lo:
-	$(CC) $(SFLAGS) $(ACLEFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/insert_string_acle.c
+	$(CC) $(SFLAGS) $(ACLEFLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/insert_string_acle.c
 
 mostlyclean: clean
 clean:
diff --git a/arch/power/Makefile.in b/arch/power/Makefile.in
index 25ebc9d..cf5839b 100644
--- a/arch/power/Makefile.in
+++ b/arch/power/Makefile.in
@@ -8,12 +8,13 @@ SFLAGS=
 INCLUDES=
 SUFFIX=
 
+P8FLAGS=-mcpu=power8
+NOLTOFLAG=
+
 SRCDIR=.
 SRCTOP=../..
 TOPDIR=$(SRCTOP)
 
-P8FLAGS=-mcpu=power8
-
 all: power.o \
      power.lo \
      adler32_power8.o \
@@ -28,16 +29,16 @@ power.lo:
 	$(CC) $(SFLAGS) $(INCLUDES) -c -o $@ $(SRCDIR)/power.c
 
 adler32_power8.o:
-	$(CC) $(CFLAGS) $(P8FLAGS) $(INCLUDES) -c -o $@ $(SRCDIR)/adler32_power8.c
+	$(CC) $(CFLAGS) $(P8FLAGS) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/adler32_power8.c
 
 adler32_power8.lo:
-	$(CC) $(SFLAGS) $(P8FLAGS) $(INCLUDES) -c -o $@ $(SRCDIR)/adler32_power8.c
+	$(CC) $(SFLAGS) $(P8FLAGS) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/adler32_power8.c
 
 slide_hash_power8.o:
-	$(CC) $(CFLAGS) $(P8FLAGS) $(INCLUDES) -c -o $@ $(SRCDIR)/slide_hash_power8.c
+	$(CC) $(CFLAGS) $(P8FLAGS) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/slide_hash_power8.c
 
 slide_hash_power8.lo:
-	$(CC) $(SFLAGS) $(P8FLAGS) $(INCLUDES) -c -o $@ $(SRCDIR)/slide_hash_power8.c
+	$(CC) $(SFLAGS) $(P8FLAGS) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/slide_hash_power8.c
 
 mostlyclean: clean
 clean:
diff --git a/arch/x86/Makefile.in b/arch/x86/Makefile.in
index 4f6594e..13c736c 100644
--- a/arch/x86/Makefile.in
+++ b/arch/x86/Makefile.in
@@ -13,6 +13,7 @@ SSE2FLAG=-msse2
 SSSE3FLAG=-mssse3
 SSE4FLAG=-msse4
 PCLMULFLAG=-mpclmul
+NOLTOFLAG=
 
 SRCDIR=.
 SRCTOP=../..
@@ -38,64 +39,64 @@ x86.lo:
 	$(CC) $(SFLAGS) $(INCLUDES) -c -o $@ $(SRCDIR)/x86.c
 
 chunkset_avx.o:
-	$(CC) $(CFLAGS) $(AVX2FLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/chunkset_avx.c
+	$(CC) $(CFLAGS) $(AVX2FLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/chunkset_avx.c
 
 chunkset_avx.lo:
-	$(CC) $(SFLAGS) $(AVX2FLAG) -DPIC $(INCLUDES) -c -o $@ $(SRCDIR)/chunkset_avx.c
+	$(CC) $(SFLAGS) $(AVX2FLAG) $(NOLTOFLAG) -DPIC $(INCLUDES) -c -o $@ $(SRCDIR)/chunkset_avx.c
 
 chunkset_sse.o:
-	$(CC) $(CFLAGS) $(SSE2FLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/chunkset_sse.c
+	$(CC) $(CFLAGS) $(SSE2FLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/chunkset_sse.c
 
 chunkset_sse.lo:
-	$(CC) $(SFLAGS) $(SSE2FLAG) -DPIC $(INCLUDES) -c -o $@ $(SRCDIR)/chunkset_sse.c
+	$(CC) $(SFLAGS) $(SSE2FLAG) $(NOLTOFLAG) -DPIC $(INCLUDES) -c -o $@ $(SRCDIR)/chunkset_sse.c
 
 compare258_avx.o:
-	$(CC) $(CFLAGS) $(AVX2FLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/compare258_avx.c
+	$(CC) $(CFLAGS) $(AVX2FLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/compare258_avx.c
 
 compare258_avx.lo:
-	$(CC) $(SFLAGS) $(AVX2FLAG) -DPIC $(INCLUDES) -c -o $@ $(SRCDIR)/compare258_avx.c
+	$(CC) $(SFLAGS) $(AVX2FLAG) $(NOLTOFLAG) -DPIC $(INCLUDES) -c -o $@ $(SRCDIR)/compare258_avx.c
 
 compare258_sse.o:
-	$(CC) $(CFLAGS) $(SSE4FLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/compare258_sse.c
+	$(CC) $(CFLAGS) $(SSE4FLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/compare258_sse.c
 
 compare258_sse.lo:
-	$(CC) $(SFLAGS) $(SSE4FLAG) -DPIC $(INCLUDES) -c -o $@ $(SRCDIR)/compare258_sse.c
+	$(CC) $(SFLAGS) $(SSE4FLAG) $(NOLTOFLAG) -DPIC $(INCLUDES) -c -o $@ $(SRCDIR)/compare258_sse.c
 
 insert_string_sse.o:
-	$(CC) $(CFLAGS) $(SSE4FLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/insert_string_sse.c
+	$(CC) $(CFLAGS) $(SSE4FLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/insert_string_sse.c
 
 insert_string_sse.lo:
-	$(CC) $(SFLAGS) $(SSE4FLAG) -DPIC $(INCLUDES) -c -o $@ $(SRCDIR)/insert_string_sse.c
+	$(CC) $(SFLAGS) $(SSE4FLAG) $(NOLTOFLAG) -DPIC $(INCLUDES) -c -o $@ $(SRCDIR)/insert_string_sse.c
 
 crc_folding.o:
-	$(CC) $(CFLAGS) $(PCLMULFLAG) $(SSE4FLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/crc_folding.c
+	$(CC) $(CFLAGS) $(PCLMULFLAG) $(SSE4FLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/crc_folding.c
 
 crc_folding.lo:
-	$(CC) $(SFLAGS) $(PCLMULFLAG) $(SSE4FLAG) -DPIC $(INCLUDES) -c -o $@ $(SRCDIR)/crc_folding.c
+	$(CC) $(SFLAGS) $(PCLMULFLAG) $(SSE4FLAG) $(NOLTOFLAG) -DPIC $(INCLUDES) -c -o $@ $(SRCDIR)/crc_folding.c
 
 slide_avx.o:
-	$(CC) $(CFLAGS) $(AVX2FLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/slide_avx.c
+	$(CC) $(CFLAGS) $(AVX2FLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/slide_avx.c
 
 slide_avx.lo:
-	$(CC) $(SFLAGS) $(AVX2FLAG) -DPIC $(INCLUDES) -c -o $@ $(SRCDIR)/slide_avx.c
+	$(CC) $(SFLAGS) $(AVX2FLAG) $(NOLTOFLAG) -DPIC $(INCLUDES) -c -o $@ $(SRCDIR)/slide_avx.c
 
 slide_sse.o:
-	$(CC) $(CFLAGS) $(SSE2FLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/slide_sse.c
+	$(CC) $(CFLAGS) $(SSE2FLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/slide_sse.c
 
 slide_sse.lo:
-	$(CC) $(SFLAGS) $(SSE2FLAG) -DPIC $(INCLUDES) -c -o $@ $(SRCDIR)/slide_sse.c
+	$(CC) $(SFLAGS) $(SSE2FLAG) $(NOLTOFLAG) -DPIC $(INCLUDES) -c -o $@ $(SRCDIR)/slide_sse.c
 
 adler32_avx.o: $(SRCDIR)/adler32_avx.c
-	$(CC) $(CFLAGS) $(AVX2FLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/adler32_avx.c
+	$(CC) $(CFLAGS) $(AVX2FLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/adler32_avx.c
 
 adler32_avx.lo: $(SRCDIR)/adler32_avx.c
-	$(CC) $(SFLAGS) $(AVX2FLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/adler32_avx.c
+	$(CC) $(SFLAGS) $(AVX2FLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/adler32_avx.c
 
 adler32_ssse3.o: $(SRCDIR)/adler32_ssse3.c
-	$(CC) $(CFLAGS) $(SSSE3FLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/adler32_ssse3.c
+	$(CC) $(CFLAGS) $(SSSE3FLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/adler32_ssse3.c
 
 adler32_ssse3.lo: $(SRCDIR)/adler32_ssse3.c
-	$(CC) $(SFLAGS) $(SSSE3FLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/adler32_ssse3.c
+	$(CC) $(SFLAGS) $(SSSE3FLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/adler32_ssse3.c
 
 mostlyclean: clean
 clean:
diff --git a/configure b/configure
index d1a44db..aafaa06 100755
--- a/configure
+++ b/configure
@@ -109,6 +109,7 @@ sse42flag="-msse4.2"
 pclmulflag="-mpclmul"
 acleflag=
 neonflag=
+noltoflag="-fno-lto"
 without_optimizations=0
 without_new_strategies=0
 gcc=0
@@ -239,6 +240,7 @@ if test $native -eq 1; then
   sse4flag=""
   sse42flag=""
   pclmulflag=""
+  noltoflag=""
 fi
 
 if test $build32 -eq 1; then
@@ -871,10 +873,23 @@ echo "" > test.c
 int main() { return 0; }
 EOF
 if test "$gcc" -eq 1 && ($cc $CFLAGS -fno-semantic-interposition -c $test.c) >> configure.log 2>&1; then
-  echo "Checking for -no-semantic-interposition... Yes." | tee -a configure.log
+  echo "Checking for -fno-semantic-interposition... Yes." | tee -a configure.log
   SFLAGS="$SFLAGS -fno-semantic-interposition"
 else
-  echo "Checking for -no-semantic-interposition... No." | tee -a configure.log
+  echo "Checking for -fno-semantic-interposition... No." | tee -a configure.log
+fi
+
+# Check for -fno-lto compiler support
+if test $gcc -eq 1 -a $without_optimizations -eq 0 -a $native -eq 0; then
+  cat > $test.c <<EOF
+int main() { return 0; }
+EOF
+  if $cc $CFLAGS -fno-lto -c $test.c >> configure.log 2>&1; then
+    echo "Checking for -fno-lto... Yes." | tee -a configure.log
+  else
+    echo "Checking for -fno-lto... No." | tee -a configure.log
+    noltoflag=""
+  fi
 fi
 
 # see if we can hide zlib internal symbols that are linked between separate source files using hidden
@@ -1659,6 +1674,7 @@ sed < $SRCDIR/$ARCHDIR/Makefile.in "
 /^PCLMULFLAG *=/s#=.*#=$pclmulflag#
 /^ACLEFLAG *=/s#=.*#=$acleflag#
 /^NEONFLAG *=/s#=.*#=$neonflag#
+/^NOLTOFLAG *=/s#=.*#=$noltoflag#
 " > $ARCHDIR/Makefile
 
 # Append header files dependences.