5 files changed, 17 insertions, 0 deletions
diff --git a/gcc/c-family/c-ppoutput.cc b/gcc/c-family/c-ppoutput.cc
index 4aa2bef..4f97376 100644
--- a/gcc/c-family/c-ppoutput.cc
+++ b/gcc/c-family/c-ppoutput.cc
@@ -862,4 +862,9 @@ cb_read_pch (cpp_reader *pfile, const char *name,
 
   fprintf (print.outf, "#pragma GCC pch_preprocess \"%s\"\n", name);
   print.src_line++;
+
+  /* The process of reading the PCH has destroyed the frontend parser,
+     so ask the frontend to reinitialize it, in case we need it to
+     process any #pragma directives encountered while preprocessing.  */
+  c_init_preprocess ();
 }
diff --git a/gcc/testsuite/g++.dg/pch/pr112319.C b/gcc/testsuite/g++.dg/pch/pr112319.C
new file mode 100644
index 0000000..9e0457e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pch/pr112319.C
@@ -0,0 +1,5 @@
+/* { dg-additional-options "-Wpragmas -save-temps" } */
+#include "pr112319.H"
+#pragma GCC diagnostic error "-Wpragmas"
+#pragma GCC diagnostic ignored "oops" /* { dg-error "oops" } */
+/* { dg-regexp {[^[:space:]]*: some warnings being treated as errors} } */
diff --git a/gcc/testsuite/g++.dg/pch/pr112319.Hs b/gcc/testsuite/g++.dg/pch/pr112319.Hs
new file mode 100644
index 0000000..3b6178b
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pch/pr112319.Hs
@@ -0,0 +1 @@
+/* This space intentionally left blank.  */
diff --git a/gcc/testsuite/gcc.dg/pch/pr112319.c b/gcc/testsuite/gcc.dg/pch/pr112319.c
new file mode 100644
index 0000000..0438814
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pch/pr112319.c
@@ -0,0 +1,5 @@
+/* { dg-additional-options "-Wpragmas -save-temps" } */
+#include "pr112319.h"
+#pragma GCC diagnostic error "-Wpragmas"
+#pragma GCC diagnostic ignored "oops" /* { dg-error "oops" } */
+/* { dg-regexp {[^[:space:]]*: some warnings being treated as errors} } */
diff --git a/gcc/testsuite/gcc.dg/pch/pr112319.hs b/gcc/testsuite/gcc.dg/pch/pr112319.hs
new file mode 100644
index 0000000..3b6178b
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pch/pr112319.hs
@@ -0,0 +1 @@
+/* This space intentionally left blank.  */