diff --git a/software/build-scripts/build.sh b/software/build-scripts/build.sh
index 1654fc2..158d889 100755
--- a/software/build-scripts/build.sh
+++ b/software/build-scripts/build.sh
@@ -30,7 +30,7 @@ if [ ! -e build/usr/sbin/infnoise ] ; then
 	exit 1;
 fi
 
-fakeroot dpkg -b build/ infnoise_${VERSION}_${ARCH}.deb
+fakeroot dpkg-deb -Zxz -b build/ infnoise_${VERSION}_${ARCH}.deb
 
 ### build infnoise-tools ###
 rm -rf build
@@ -54,7 +54,7 @@ cp ../build-scripts/control.debian.tools build/DEBIAN/control
 echo "Version: $VERSION" >> build/DEBIAN/control
 echo "Architecture: $ARCH" >> build/DEBIAN/control
 
-fakeroot dpkg -b build/ infnoise-tools_${VERSION}_${ARCH}.deb
+fakeroot dpkg-deb -Zxz -b build/ infnoise-tools_${VERSION}_${ARCH}.deb
 
 rm -rf build
 cd ..
@@ -75,6 +75,6 @@ cp build-scripts/control.debian.lib build/DEBIAN/control
 echo "Version: $VERSION" >> build/DEBIAN/control
 echo "Architecture: $ARCH" >> build/DEBIAN/control
 
-fakeroot dpkg -b build/ libinfnoise_${VERSION}_${ARCH}.deb
+fakeroot dpkg-deb -Zxz -b build/ libinfnoise_${VERSION}_${ARCH}.deb
 
 rm -rf build
diff --git a/software/libinfnoise.h b/software/libinfnoise.h
index 335094e..93be369 100644
--- a/software/libinfnoise.h
+++ b/software/libinfnoise.h
@@ -15,6 +15,10 @@
 // We also write this in one go to the Keccak sponge, which is at most 1600 bits
 #define BUFLEN 512u
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #if !defined(_WIN32)
 struct infnoise_context {
     struct ftdi_context ftdic;
@@ -86,4 +90,8 @@ void deinitInfnoise(struct infnoise_context *context);
 */
 uint32_t readData(struct infnoise_context *context, uint8_t *result, bool raw, uint32_t outputMultiplier);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
diff --git a/software/libinfnoise.version b/software/libinfnoise.version
index c4c671a..84ceead 100644
--- a/software/libinfnoise.version
+++ b/software/libinfnoise.version
@@ -1,5 +1,5 @@
 libinfnoise {
-  global: listUSBDevices; initInfnoise; readRawData; readData; # explicitly list symbols to be exported
+  global: listUSBDevices; initInfnoise; deinitInfnoise; readRawData; readData; # explicitly list symbols to be exported
   local: *;         # hide everything else
 };
 
diff --git a/software/tools/findlongest.c b/software/tools/findlongest.c
old mode 100644
new mode 100755
index c4a961a..f4dc44b
--- a/software/tools/findlongest.c
+++ b/software/tools/findlongest.c
@@ -98,7 +98,7 @@ int main(int argc, char **argv) {
     } else {
         data = readDataFromFile(argv[1], &dataLen);
     }
-    uint8_t *stringsSeen = calloc((uint64_t)1 << (MAX_STRING_SIZE-3u), sizeof(uint8_t));
+    uint8_t *stringsSeen = calloc((uint64_t)1 << (MAX_STRING_SIZE-4u), sizeof(uint8_t));
     uint32_t len;
     for(len = 4u; len <= MAX_STRING_SIZE; len++) {
         if(!hasSubstringOfLength(len, data, dataLen, stringsSeen)) {
diff --git a/software/writeentropy.c b/software/writeentropy.c
index 952123a..379a04f 100644
--- a/software/writeentropy.c
+++ b/software/writeentropy.c
@@ -4,7 +4,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
-#include <sys/poll.h>
+#include <poll.h>
 #include <sys/ioctl.h>
 #include <fcntl.h>
 #include <linux/random.h>
@@ -25,7 +25,7 @@ static uint32_t readNumberFromFile(char *fileName) {
         exit(1);
     }
     uint32_t value = 0u;
-    char c;
+    int32_t c;
     while( (c = getc(file)) != EOF
            && '0' <= c && c <= '9' ) {
         value *= 10;