Generate LLVM debug information

.github/workflows/build-test.yml

@@ -4,14 +4,14 @@ on: [push, pull_request]
 
 jobs:
   build-ubuntu:
-    name: Ubuntu 18.04
-    runs-on: ubuntu-18.04
+    name: Ubuntu 20.04
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
         with:
           fetch-depth: 1
       - name: Install dependencies
-        run: sudo apt-get install automake flex llvm-dev check lcov
+        run: sudo apt-get install automake flex llvm-dev check lcov libdw-dev
       - name: Generate configure script
         run: ./autogen.sh
       - name: Configure

HISTORY.md

@@ -16,6 +16,7 @@
 - Fixed a crash when a long running procedure suspends in a loop (#412).
 - Fixed a stack overflow when a subprogram with unconstrained array
   arguments is called repeatedly in a loop (#414).
+- Compiled VHDL code now includes DWARF debug information.
 
 ## 1.5 - 2020-07-19
 - IEEE library sources are now distributed

README.md

@@ -52,8 +52,8 @@ To build from a released tarball:
     sudo make install
 
 To use a specific version of LLVM add `--with-llvm=/path/to/llvm-config`
-to the configure command. LLVM 7, 8, 9, 10, 11 and 12 have all been
-tested.
+to the configure command.  The minimum supported LLVM version is 7.0.
+Versions 7, 8, 9, 10, 11 and 12 have all been tested.
 
 NVC also depends on Flex to generate the lexical analyser.
 

configure.ac

@@ -206,7 +206,7 @@ AX_DEFINE_DIR([TESTDIR], [srcdir/test], [Location of testcases])
 linker_path=
 case $host_os in
   linux*)
-    AC_PATH_PROG([linker_path], [ld])
+    AC_PATH_TARGET_TOOL([linker_path], [ld])
     ;;
 esac
 

m4/ax_llvm_c.m4

@@ -80,13 +80,13 @@ AC_DEFUN([AX_LLVM_C], [
     LLVM_CONFIG_BINDIR="$($ac_llvm_config $ac_llvm_config_flags --bindir | sed 's|\\|\\\\|g')"
     LLVM_LIBDIR="$($ac_llvm_config --libdir | sed 's|\\|\\\\|g')"
 
-    if test "$llvm_ver_num" -lt "60"; then
-      AC_MSG_ERROR([LLVM version 6.0 or later required])
+    if test "$llvm_ver_num" -lt "70"; then
+      AC_MSG_ERROR([LLVM version 7.0 or later required])
     fi
 
-    if test "$llvm_ver_num" -lt "70"; then
-      AC_DEFINE_UNQUOTED(LLVM_INTRINSIC_ALIGN, [1],
-                         [LLVM intrinsics have alignment param])
+    if test "$llvm_ver_num" -ge "110"; then
+      AC_DEFINE_UNQUOTED(LLVM_CREATE_CU_HAS_SYSROOT, [1],
+                         [LLVMDIBuilderCreateCompileUnit has SysRoot parameter])
     fi
 
     LLVM_OBJ_EXT="o"

src/array.h

@@ -111,6 +111,11 @@ void _cleanup_array(void *ptr);
       (a).items[(a).count++] = (item);                                  \
    } while (0)
 
+#define APOP(a) ({                              \
+         assert((a).count > 0);                 \
+         (a).items[(a).count--];                \
+      })
+
 #define ACLEAR(a) do {                          \
       free((a).items);                          \
       (a).items = NULL;                         \