Also build a libgf-complete1-sse package, which contains the optimized version of the library.

debian/changelog

@@ -1,3 +1,10 @@
+gf-complete (1.0.2-3) unstable; urgency=medium
+
+  * Also build a libgf-complete1-sse package, which contains the optimized
+    version of the library.
+
+ -- Thomas Goirand <zigo@debian.org>  Fri, 18 Sep 2015 17:48:52 +0200
+
 gf-complete (1.0.2-2) unstable; urgency=medium
 
   * Team upload.

debian/check_sse.c

@@ -0,0 +1,14 @@
+#include <stdbool.h>
+#include <stdio.h>
+
+#include <cpuid.h>
+
+static inline bool can_sse41(void){
+	int a, b, c, d;
+	__cpuid (1, a, b, c, d);
+	return c & bit_SSE4_1;
+}
+
+int main(int argc, char** argv){
+	return (int) can_sse41();
+}

debian/control

@@ -37,6 +37,9 @@ Architecture: any
 Depends: ${misc:Depends},
          ${shlibs:Depends},
 Multi-Arch: same
+Breaks: libgf-complete1-sse
+Replaces: libgf-complete1-sse
+Provides: libgf-complete1-sse
 Description: Galois Field Arithmetic - shared library
  Galois Field arithmetic forms the backbone of erasure-coded storage systems,
  most famously the Reed-Solomon erasure code. A Galois Field is defined over
@@ -50,6 +53,28 @@ Description: Galois Field Arithmetic - shared library
  .
  This package contains the shared library.
 
+Package: libgf-complete1-sse
+Architecture: amd64
+Depends: ${misc:Depends},
+         ${shlibs:Depends},
+Multi-Arch: same
+Breaks: libgf-complete1
+Replaces: libgf-complete1
+Provides: libgf-complete1
+Description: Galois Field Arithmetic - shared library with SSE support
+ Galois Field arithmetic forms the backbone of erasure-coded storage systems,
+ most famously the Reed-Solomon erasure code. A Galois Field is defined over
+ w-bit words and is termed GF(2w). As such, the elements of a Galois Field are
+ the integers 0, 1, . . ., 2^w − 1. Galois Field arithmetic defines addition
+ and multiplication over these closed sets of integers in such a way that they
+ work as you would hope they would work. Specifically, every number has a
+ unique multiplicative inverse. Moreover, there is a value, typically the value
+ 2, which has the property that you can enumerate all of the non-zero elements
+ of the field by taking that value to successively higher powers.
+ .
+ This package contains the shared library, compiled with the SSE instructions
+ support for better optimization.
+
 Package: gf-complete-tools
 Architecture: any
 Depends: libgf-complete1 (= ${binary:Version}),

debian/libgf-complete1-sse.symbols

@@ -0,0 +1,85 @@
+libgf_complete.so.1 libgf-complete1 #MINVER#
+ MOA_Fill_Random_Region@Base 1.0.2
+ MOA_Random_128@Base 1.0.2
+ MOA_Random_32@Base 1.0.2
+ MOA_Random_64@Base 1.0.2
+ MOA_Random_W@Base 1.0.2
+ MOA_Seed@Base 1.0.2
+ _gf_errno@Base 1.0.2
+ bits@Base 1.0.2
+ bits_56@Base 1.0.2
+ create_gf_from_argv@Base 1.0.2
+ gf_alignment_error@Base 1.0.2
+ gf_bitmatrix_inverse@Base 1.0.2
+ gf_composite_get_default_poly@Base 1.0.2
+ gf_do_final_region_alignment@Base 1.0.2
+ gf_do_initial_region_alignment@Base 1.0.2
+ gf_error@Base 1.0.2
+ gf_error_check@Base 1.0.2
+ gf_free@Base 1.0.2
+ gf_general_add@Base 1.0.2
+ gf_general_are_equal@Base 1.0.2
+ gf_general_divide@Base 1.0.2
+ gf_general_do_region_check@Base 1.0.2
+ gf_general_do_region_multiply@Base 1.0.2
+ gf_general_do_single_timing_test@Base 1.0.2
+ gf_general_inverse@Base 1.0.2
+ gf_general_is_one@Base 1.0.2
+ gf_general_is_zero@Base 1.0.2
+ gf_general_multiply@Base 1.0.2
+ gf_general_s_to_val@Base 1.0.2
+ gf_general_set_one@Base 1.0.2
+ gf_general_set_random@Base 1.0.2
+ gf_general_set_two@Base 1.0.2
+ gf_general_set_up_single_timing_test@Base 1.0.2
+ gf_general_set_zero@Base 1.0.2
+ gf_general_val_to_s@Base 1.0.2
+ gf_init_easy@Base 1.0.2
+ gf_init_hard@Base 1.0.2
+ gf_multby_one@Base 1.0.2
+ gf_multby_zero@Base 1.0.2
+ gf_scratch_size@Base 1.0.2
+ gf_set_region_data@Base 1.0.2
+ gf_size@Base 1.0.2
+ gf_two_byte_region_table_multiply@Base 1.0.2
+ gf_w128_bytwo_b_multiply@Base 1.0.2
+ gf_w128_bytwo_b_multiply_region@Base 1.0.2
+ gf_w128_bytwo_p_multiply@Base 1.0.2
+ gf_w128_clm_multiply@Base 1.0.2
+ gf_w128_divide_from_inverse@Base 1.0.2
+ gf_w128_euclid@Base 1.0.2
+ gf_w128_extract_word@Base 1.0.2
+ gf_w128_group_multiply@Base 1.0.2
+ gf_w128_init@Base 1.0.2
+ gf_w128_inverse_from_divide@Base 1.0.2
+ gf_w128_scratch_size@Base 1.0.2
+ gf_w128_shift_multiply@Base 1.0.2
+ gf_w128_sse_bytwo_b_multiply@Base 1.0.2
+ gf_w128_sse_bytwo_p_multiply@Base 1.0.2
+ gf_w16_get_div_alog_table@Base 1.0.2
+ gf_w16_get_log_table@Base 1.0.2
+ gf_w16_get_mult_alog_table@Base 1.0.2
+ gf_w16_init@Base 1.0.2
+ gf_w16_scratch_size@Base 1.0.2
+ gf_w16_split_8_8_multiply@Base 1.0.2
+ gf_w32_init@Base 1.0.2
+ gf_w32_scratch_size@Base 1.0.2
+ gf_w4_get_div_table@Base 1.0.2
+ gf_w4_get_mult_table@Base 1.0.2
+ gf_w4_init@Base 1.0.2
+ gf_w4_scratch_size@Base 1.0.2
+ gf_w64_bytwo_p_sse_multiply_region@Base 1.0.2
+ gf_w64_clm_multiply_region@Base 1.0.2
+ gf_w64_init@Base 1.0.2
+ gf_w64_scratch_size@Base 1.0.2
+ gf_w64_split_16_64_lazy_multiply_region@Base 1.0.2
+ gf_w64_split_4_64_lazy_multiply_region@Base 1.0.2
+ gf_w64_split_8_64_lazy_multiply_region@Base 1.0.2
+ gf_w8_get_div_table@Base 1.0.2
+ gf_w8_get_mult_table@Base 1.0.2
+ gf_w8_init@Base 1.0.2
+ gf_w8_scratch_size@Base 1.0.2
+ gf_wgen_cauchy_region@Base 1.0.2
+ gf_wgen_extract_word@Base 1.0.2
+ gf_wgen_init@Base 1.0.2
+ gf_wgen_scratch_size@Base 1.0.2

debian/patches/series

@@ -1 +0,0 @@
-do-not-use-sse-ac-ext.patch

debian/rules

@@ -1,5 +1,7 @@
 #!/usr/bin/make -f
 
+include /usr/share/dpkg/architecture.mk
+
 UPSTREAM_GIT    ?= https://bitbucket.org/jimplank/gf-complete.git
 
 DEBVERS         ?= $(shell dpkg-parsechangelog | sed -n -e 's/^Version: //p')
@@ -11,8 +13,54 @@ GIT_TAG         ?= $(shell echo '$(VERSION)' | sed -e 's/~/_/')
 %:
 	dh $@  --with autoreconf --parallel
 
+override_dh_autoreconf:
+	echo "Please don't do anything!"
+
+override_dh_auto_configure:
+	echo "Please don't do anything!"
+
+override_dh_auto_install:
+ifeq ($(DEB_HOST_ARCH_CPU),amd64)
+	set -e ; set -x ; if ! [ -x debian/check_sse ] ; then \
+		gcc debian/check_sse.c -o debian/check_sse ; \
+	fi
+	set -e ; set -x ; if ./debian/check_sse ; then \
+		echo "No SSE support here..." ; \
+	else \
+		dh_autoreconf ; \
+		dh_auto_configure ; \
+		dh_auto_build ; \
+		dh_auto_install ; \
+		dh_autoreconf_clean ; \
+		mv debian/tmp debian/tmp-with-sse ; \
+	fi
+endif
+	patch -p1 <debian/do-not-use-sse-ac-ext.patch
+	dh_autoreconf
+	dh_auto_configure
+	dh_auto_build
+	dh_auto_install
+	dh_autoreconf_clean
+	patch -p1 -R <debian/do-not-use-sse-ac-ext.patch
+
+override_dh_auto_clean:
+	dh_auto_clean      
+	rm -rf debian/tmp-with-sse debian/check_sse
+
 override_dh_install:
 	dh_install
+ifeq ($(DEB_HOST_ARCH_CPU),amd64)
+	set -e ; set -x ; if ./debian/check_sse ; then \
+		echo "No SSE support here..." ; \
+	else \
+		mkdir -p $(CURDIR)/debian/libgf-complete1-sse/usr/lib ; \
+		mv $(CURDIR)/debian/tmp-with-sse/usr/lib/* $(CURDIR)/debian/libgf-complete1-sse/usr/lib ; \
+		rm $(CURDIR)/debian/libgf-complete1-sse/usr/lib/*/*.so ; \
+		rm $(CURDIR)/debian/libgf-complete1-sse/usr/lib/*/*.a ; \
+		rm $(CURDIR)/debian/libgf-complete1-sse/usr/lib/*/*.la ; \
+	fi
+endif
+
 	# NOTE(jamespage): Don't ship example binaries, just the actual tools
 	rm -rf $(CURDIR)/debian/gf-complete-tools/usr/bin/gf_example*