[PATCH] riscv: fix -Wformat-diag errors.

[Martin Liška]

Pushed as pre-approved by Jeff. The patch fixes -Wformat-diag warnings.
Martin

gcc/ChangeLog:

        * common/config/riscv/riscv-common.cc (riscv_subset_list::add):
        Wrap keywords with quotes and remove trailing dots.
        (riscv_subset_list::parsing_subset_version): Likewise.
        (riscv_subset_list::parse_std_ext): Likewise.
        (riscv_subset_list::parse_multiletter_ext): Likewise.
        * config/riscv/riscv.cc (riscv_handle_type_attribute): Likewise.
---
 gcc/common/config/riscv/riscv-common.cc | 16 ++++++++--------
 gcc/config/riscv/riscv.cc               |  4 ++--
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/gcc/common/config/riscv/riscv-common.cc 
b/gcc/common/config/riscv/riscv-common.cc
index c1d8431c1fa..004822bfe6c 100644
--- a/gcc/common/config/riscv/riscv-common.cc
+++ b/gcc/common/config/riscv/riscv-common.cc
@@ -375,7 +375,7 @@ riscv_subset_list::add (const char *subset, int 
major_version,
       else
        error_at (
          m_loc,
-         "%<-march=%s%>: Extension `%s' appear more than one time.",
+         "%<-march=%s%>: extension %qs appear more than one time",
          m_arch,
          subset);
 
@@ -613,14 +613,14 @@ riscv_subset_list::parsing_subset_version (const char *ext,
          {
            if (!ISDIGIT (*(p+1)))
              {
-               error_at (m_loc, "%<-march=%s%>: Expect number "
-                         "after %<%dp%>.", m_arch, version);
+               error_at (m_loc, "%<-march=%s%>: expect number "
+                         "after %<%dp%>", m_arch, version);
                return NULL;
              }
            if (!major_p)
              {
-               error_at (m_loc, "%<-march=%s%>: For %<%s%dp%dp?%>, version "
-                         "number with more than 2 level is not supported.",
+               error_at (m_loc, "%<-march=%s%>: for %<%s%dp%dp?%>, version "
+                         "number with more than 2 level is not supported",
                          m_arch, ext, major, version);
                return NULL;
              }
@@ -701,8 +701,8 @@ riscv_subset_list::parse_std_ext (const char *p)
                                  /* std_ext_p= */ true, &explicit_version_p);
       if (major_version != 0 || minor_version != 0)
        {
-         warning_at (m_loc, 0, "version of `g` will be omitted, please "
-                               "specify version for individual extension.");
+         warning_at (m_loc, 0, "version of %<g%> will be omitted, please "
+                               "specify version for individual extension");
        }
 
       /* We have special rule for G, we disallow rv32gm2p but allow rv32g_zicsr
@@ -906,7 +906,7 @@ riscv_subset_list::parse_multiletter_ext (const char *p,
 
       if (*p != '\0' && *p != '_')
        {
-         error_at (m_loc, "%<-march=%s%>: %s must separate with _",
+         error_at (m_loc, "%<-march=%s%>: %s must separate with %<_%>",
                    m_arch, ext_type_str);
          return NULL;
        }
diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index 7c806780883..8314864d5e7 100644
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -3309,8 +3309,8 @@ riscv_handle_type_attribute (tree *node ATTRIBUTE_UNUSED, 
tree name, tree args,
              && strcmp (string, "machine"))
            {
              warning (OPT_Wattributes,
-                      "argument to %qE attribute is not \"user\", \"supervisor\", or 
\"machine\"",
-                      name);
+                      "argument to %qE attribute is not %<user%>, %<supervisor%>, 
"
+                      "or %<machine%>", name);
              *no_add_attrs = true;
            }
        }
--
2.34.1