[build] some more stacktrace stuff

release/vagrant-static/build.sh

@@ -46,11 +46,11 @@ if test x"${OS}" != x"FreeBSD"; then
         TARGET_FILE='/vagrant/lnav-musl.zip'
         ../lnav/configure \
             --with-libarchive=${FAKE_ROOT} \
-            CFLAGS='-static -no-pie -s -O2' \
-            CXXFLAGS='-static -U__unused -no-pie -s -O2' \
-            LDFLAGS="-L${FAKE_ROOT}/lib" \
-            CPPFLAGS="-I${FAKE_ROOT}/include" \
-            LIBS="-L${FAKE_ROOT}/lib -lssh2 -llzma -lssl -lcrypto -lz" \
+            CFLAGS='-static -g1 -no-pie -s -O2' \
+            CXXFLAGS='-static -g1 -U__unused -no-pie -s -O2' \
+            LDFLAGS="-L${FAKE_ROOT}/lib -Wl,-allow-multiple-definition" \
+            CPPFLAGS="-I${FAKE_ROOT}/include -DBACKWARD_HAS_UNWIND=0 -DBACKWARD_HAS_LIBUNWIND=1 -DBACKWARD_HAS_DW=1" \
+            LIBS="-L${FAKE_ROOT}/lib -ldw -lelf -lunwind -lexecinfo -lssh2 -llzma -lssl -lcrypto -lz" \
             --enable-static
             PATH="${FAKE_ROOT}/bin:${PATH}"
     else

release/vagrant-static/musl-pkg.sh

@@ -13,11 +13,11 @@ sudo apk add \
     automake \
     elfutils \
     elfutils-dev \
-    libdwarf \
-    libdwarf-dev \
-    libdwarf-static \
     libelf-static \
     libexecinfo-dev \
     libexecinfo-static \
     libtool \
+    libunwind \
+    libunwind-dev \
+    libunwind-static \
     linux-headers

src/third-party/backward-cpp/backward.hpp

@@ -1019,11 +1019,7 @@ public:
 
     unw_cursor_t cursor;
     if (context()) {
-#if defined(UNW_INIT_SIGNAL_FRAME)
       result = unw_init_local2(&cursor, &ctx, UNW_INIT_SIGNAL_FRAME);
-#else
-      result = unw_init_local(&cursor, &ctx);
-#endif
     } else {
       unw_getcontext(&ctx);
       ;