fix linux build

Author: gorazdko

Makefile.in

@@ -7,6 +7,11 @@
 #  Licensed under the "BSD-2-Clause Plus Patent License"
 #
 
+UNAME := $(shell uname)
+ifeq ($(UNAME), Linux)
+    SHELL := /bin/bash
+endif
+
 # Package-specific substitution variables
 package = @PACKAGE_NAME@
 version = @PACKAGE_VERSION@

README.md

@@ -135,11 +135,35 @@ See [`MANUAL.md`](MANUAL.md) for details, many more examples, and version histor
 
 These dependencies are automatically installed as submodules when you run the build script. This is the recommended way to install.
 
+### MacOS
+
 ```bash
 $ ./build.sh
 $ sudo make install
 ```
 
+### Linux
+
+Make sure you have llvm/clang, libc++ and libc++abi installed. All of them with
+a minimum recommended version 10.
+
+#### Ubuntu and Debian
+
+```bash
+$ sudo apt-get install make
+
+$ wget https://apt.llvm.org/llvm.sh
+$ chmod +x llvm.sh
+$ sudo ./llvm.sh 10  # version 10
+
+$ sudo apt-get install libc++-10-dev libc++abi-10-dev
+```
+
+```bash
+$ export CC="clang-10" && export CXX="clang++-10" && ./build.sh
+$ sudo make install
+```
+
 ## Alternative Installation
 
 This sequence does *not* install the dependencies from submodules; instead they must be installed in the usual places on the build system, otherwise the `./configure` step below will fail.
@@ -149,6 +173,7 @@ $ ./configure
 $ make
 $ sudo make install
 ```
+*Note:* On Linux the first step is `./configure CC=clang-10 CXX=clang++-10`
 
 ## Incremental Builds
 

configure

@@ -3753,19 +3753,6 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_bc_bytewords_bytewords_encode" >&5
 $as_echo "$ac_cv_lib_bc_bytewords_bytewords_encode" >&6; }
-if test "x$ac_cv_lib_bc_bytewords_bytewords_encode" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_LIBBC_BYTEWORDS 1
-_ACEOF
-
-  LIBS="-lbc-bytewords $LIBS"
-
-else
-
-  echo "### Error! libbc-bytewords must be installed first."
-  exit -1
-
-fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for argp_parse in -largp" >&5
 $as_echo_n "checking for argp_parse in -largp... " >&6; }
@@ -5820,4 +5807,3 @@ if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then
   { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: unrecognized options: $ac_unrecognized_opts" >&5
 $as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;}
 fi
-

configure.ac

@@ -29,10 +29,6 @@ AC_CHECK_LIB([bc-bip39], [bip39_mnemonic_from_word], [], [
   echo "### Error! libbc-bip39 must be installed first."
   exit -1
   ])
-AC_CHECK_LIB([bc-bytewords], [bytewords_encode], [], [
-  echo "### Error! libbc-bytewords must be installed first."
-  exit -1
-  ])
 AC_CHECK_LIB([argp], [argp_parse], [], [
   echo "### Error! argp must be installed first. Try 'brew install argp-standalone'."
   exit -1

deps/bc-bip39

@@ -59,7 +59,13 @@ OBJS = \
 	randombytes.o \
 	hkdf.o
 
-LDFLAGS += -lstdc++ -lbc-crypto-base -lbc-shamir -lbc-slip39 -lbc-bip39 -lbc-ur -largp
+LDFLAGS += -lstdc++
+LDLIBS += -lbc-slip39 -lbc-shamir -lbc-crypto-base -lbc-bip39 -lbc-ur -largp
+
+UNAME := $(shell uname)
+ifeq ($(UNAME), Linux)
+    LDLIBS += -lm -lc++ -lc++abi -lgcc_s -lgcc
+endif
 
 $(toolname): $(OBJS)