git diff be62b2b c3be50e > src/patches/latex-footnotes.diff

src/patches/apply.sh

@@ -2,4 +2,5 @@
 
 # Upstream PR: https://github.com/github/cmark-gfm/pull/362
 patch -p2 -d ../cmark < 362.diff
-
+# Support footnotes for LaTeX: https://github.com/r-lib/commonmark/pull/32
+patch -p2 -d ../cmark < latex-footnotes.diff

src/patches/latex-footnotes.diff

@@ -0,0 +1,26 @@
+diff --git a/src/cmark/latex.c b/src/cmark/latex.c
+index 1a6367a..5fab7ee 100644
+--- a/src/cmark/latex.c
++++ b/src/cmark/latex.c
+@@ -447,8 +447,20 @@ static int S_render_node(cmark_renderer *renderer, cmark_node *node,
+     break;
+
+   case CMARK_NODE_FOOTNOTE_DEFINITION:
++    if (entering) {
++      LIT("\\footnotetext[");
++      OUT(cmark_chunk_to_cstr(renderer->mem, &node->as.literal), false, LITERAL);
++      LIT("]{");
++    } else {
++      LIT("}");
++    }
++    break;
+   case CMARK_NODE_FOOTNOTE_REFERENCE:
+-    // TODO
++    if (entering) {
++      LIT("\\footnotemark[");
++      OUT(cmark_chunk_to_cstr(renderer->mem, &node->parent_footnote_def->as.literal), false, LITERAL);
++      LIT("]");
++    }
+     break;
+
+   default: