Masanori Ogino has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/45311 )
Change subject: crossgcc: Fix libcpp to address -Wformat-security. ......................................................................
crossgcc: Fix libcpp to address -Wformat-security.
On some systems where the system compiler enables `-Wformat-security -Werror=format-security` options are enabled by default, building libcpp fails because the code passes a variable directly as a format string.
This change addresses this problem by patching the affected code.
Tested with the default compiler of Nixpkgs unstable, GCC 9.3.0 with the options described above enabled by default.
Signed-off-by: Masanori Ogino mogino@acm.org Change-Id: Ibf3c9e79ce10cd400c9f7ea40dd6de1ab81b50e2 --- A util/crossgcc/patches/gcc-8.3.0_libcpp.patch 1 file changed, 56 insertions(+), 0 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/11/45311/1
diff --git a/util/crossgcc/patches/gcc-8.3.0_libcpp.patch b/util/crossgcc/patches/gcc-8.3.0_libcpp.patch new file mode 100644 index 0000000..b2701511 --- /dev/null +++ b/util/crossgcc/patches/gcc-8.3.0_libcpp.patch @@ -0,0 +1,56 @@ +GCC with `-Wformat-security -Werror=format-security` hardening options enabled +by default rejects some codes in libcpp. This patch fixes them. + +--- gcc-8.3.0/libcpp/expr.c.orig 2020-09-11 15:44:45.770000000 +0900 ++++ gcc-8.3.0/libcpp/expr.c 2020-09-11 15:46:22.370000000 +0900 +@@ -794,10 +794,10 @@ + + if (CPP_OPTION (pfile, c99)) + cpp_warning_with_line (pfile, CPP_W_LONG_LONG, virtual_location, +- 0, message); ++ 0, "%s", message); + else + cpp_pedwarning_with_line (pfile, CPP_W_LONG_LONG, +- virtual_location, 0, message); ++ virtual_location, 0, "%s", message); + } + + result |= CPP_N_INTEGER; +--- gcc-8.3.0/libcpp/macro.c.bak 2020-09-11 16:01:42.550000000 +0900 ++++ gcc-8.3.0/libcpp/macro.c 2020-09-11 16:03:47.850000000 +0900 +@@ -160,7 +160,7 @@ + if (m_state == 2 && token->type == CPP_PASTE) + { + cpp_error_at (m_pfile, CPP_DL_ERROR, token->src_loc, +- vaopt_paste_error); ++ "%s", vaopt_paste_error); + return ERROR; + } + /* Advance states before further considering this token, in +@@ -189,7 +189,7 @@ + if (was_paste) + { + cpp_error_at (m_pfile, CPP_DL_ERROR, token->src_loc, +- vaopt_paste_error); ++ "%s", vaopt_paste_error); + return ERROR; + } + +@@ -3361,7 +3361,7 @@ + function-like macros, but not at the end. */ + if (following_paste_op) + { +- cpp_error (pfile, CPP_DL_ERROR, paste_op_error_msg); ++ cpp_error (pfile, CPP_DL_ERROR, "%s", paste_op_error_msg); + return false; + } + break; +@@ -3374,7 +3374,7 @@ + function-like macros, but not at the beginning. */ + if (macro->count == 1) + { +- cpp_error (pfile, CPP_DL_ERROR, paste_op_error_msg); ++ cpp_error (pfile, CPP_DL_ERROR, "%s", paste_op_error_msg); + return false; + } +