[PATCH 1/2] stdio-common: run AWK in the C locale in the printf format tests

The program under test runs in the C locale, through the test program
prefix, but AWK inherits whatever locale the build was started in.  They
agree today only because the locale in use shares its decimal point with
the C locale.

It is also faster.  gawk takes a single byte path in its regular
expression engine when MB_CUR_MAX is 1, and the script matches several
expressions against every line.  For the %f conversion for double, the
largest of these tests, as the median of five runs:

  x86_64, gawk 5.4.1    1.482s -> 1.248s
  x86_64, gawk 5.3.2    0.911s -> 0.703s
  alpha,  gawk 5.4.60    30.9s ->  26.6s

Worth noting that gawk 5.4 is a good deal slower here than 5.3 was, at
1.248s against 0.703s for the same input in the C locale, so these tests
have become more expensive than they used to be.
---
 stdio-common/tst-printf-format-c.sh       | 2 +-
 stdio-common/tst-printf-format-char.sh    | 2 +-
 stdio-common/tst-printf-format-double.sh  | 2 +-
 stdio-common/tst-printf-format-int.sh     | 2 +-
 stdio-common/tst-printf-format-ldouble.sh | 2 +-
 stdio-common/tst-printf-format-llong.sh   | 2 +-
 stdio-common/tst-printf-format-long.sh    | 2 +-
 stdio-common/tst-printf-format-s.sh       | 2 +-
 stdio-common/tst-printf-format-short.sh   | 2 +-
 stdio-common/tst-printf-format-uchar.sh   | 2 +-
 stdio-common/tst-printf-format-uint.sh    | 2 +-
 stdio-common/tst-printf-format-ullong.sh  | 2 +-
 stdio-common/tst-printf-format-ulong.sh   | 2 +-
 stdio-common/tst-printf-format-ushort.sh  | 2 +-
 14 files changed, 14 insertions(+), 14 deletions(-)

diff --git ./stdio-common/tst-printf-format-c.sh ./stdio-common/tst-printf-format-c.sh
index 825c50ec42..636884d3a7 100644
--- ./stdio-common/tst-printf-format-c.sh
+++ ./stdio-common/tst-printf-format-c.sh
@@ -23,7 +23,7 @@ xprintf=$1; shift
 common_objpfx=$1; shift
 test_program_prefix=$1; shift
 
-AWK=${AWK:-awk}
+AWK="LC_ALL=C ${AWK:-awk}"
 
 echo Verifying c
 (set -o pipefail
diff --git ./stdio-common/tst-printf-format-char.sh ./stdio-common/tst-printf-format-char.sh
index 7867bdd62f..a3eb0665f2 100644
--- ./stdio-common/tst-printf-format-char.sh
+++ ./stdio-common/tst-printf-format-char.sh
@@ -23,7 +23,7 @@ xprintf=$1; shift
 common_objpfx=$1; shift
 test_program_prefix=$1; shift
 
-AWK=${AWK:-awk}
+AWK="LC_ALL=C ${AWK:-awk}"
 
 status=0
 
diff --git ./stdio-common/tst-printf-format-double.sh ./stdio-common/tst-printf-format-double.sh
index 8157092dc4..ddbffd19aa 100644
--- ./stdio-common/tst-printf-format-double.sh
+++ ./stdio-common/tst-printf-format-double.sh
@@ -29,7 +29,7 @@ test_program_prefix=$1; shift
 # internally to process the conversion requested, so any bug in our code
 # would then be verified against itself, defeating the objective of doing
 # the verification against an independent implementation.
-AWK="${AWK:-awk} -M"
+AWK="LC_ALL=C ${AWK:-awk} -M"
 
 status=77
 
diff --git ./stdio-common/tst-printf-format-int.sh ./stdio-common/tst-printf-format-int.sh
index 8542ff4150..2cca1dc884 100644
--- ./stdio-common/tst-printf-format-int.sh
+++ ./stdio-common/tst-printf-format-int.sh
@@ -23,7 +23,7 @@ xprintf=$1; shift
 common_objpfx=$1; shift
 test_program_prefix=$1; shift
 
-AWK=${AWK:-awk}
+AWK="LC_ALL=C ${AWK:-awk}"
 
 status=77
 
diff --git ./stdio-common/tst-printf-format-ldouble.sh ./stdio-common/tst-printf-format-ldouble.sh
index dbf78a98c6..9acb1237de 100644
--- ./stdio-common/tst-printf-format-ldouble.sh
+++ ./stdio-common/tst-printf-format-ldouble.sh
@@ -29,7 +29,7 @@ test_program_prefix=$1; shift
 # internally to process the conversion requested, so any bug in our code
 # would then be verified against itself, defeating the objective of doing
 # the verification against an independent implementation.
-AWK="${AWK:-awk} -M"
+AWK="LC_ALL=C ${AWK:-awk} -M"
 
 status=77
 
diff --git ./stdio-common/tst-printf-format-llong.sh ./stdio-common/tst-printf-format-llong.sh
index e1f5252c9a..5e10e87fa6 100644
--- ./stdio-common/tst-printf-format-llong.sh
+++ ./stdio-common/tst-printf-format-llong.sh
@@ -23,7 +23,7 @@ xprintf=$1; shift
 common_objpfx=$1; shift
 test_program_prefix=$1; shift
 
-AWK=${AWK:-awk}
+AWK="LC_ALL=C ${AWK:-awk}"
 
 status=77
 
diff --git ./stdio-common/tst-printf-format-long.sh ./stdio-common/tst-printf-format-long.sh
index 4b68ab1e04..0e17fcd596 100644
--- ./stdio-common/tst-printf-format-long.sh
+++ ./stdio-common/tst-printf-format-long.sh
@@ -23,7 +23,7 @@ xprintf=$1; shift
 common_objpfx=$1; shift
 test_program_prefix=$1; shift
 
-AWK=${AWK:-awk}
+AWK="LC_ALL=C ${AWK:-awk}"
 
 status=77
 
diff --git ./stdio-common/tst-printf-format-s.sh ./stdio-common/tst-printf-format-s.sh
index 65aa0cb675..d0a2ffd166 100644
--- ./stdio-common/tst-printf-format-s.sh
+++ ./stdio-common/tst-printf-format-s.sh
@@ -23,7 +23,7 @@ xprintf=$1; shift
 common_objpfx=$1; shift
 test_program_prefix=$1; shift
 
-AWK=${AWK:-awk}
+AWK="LC_ALL=C ${AWK:-awk}"
 
 echo Verifying s
 (set -o pipefail
diff --git ./stdio-common/tst-printf-format-short.sh ./stdio-common/tst-printf-format-short.sh
index 30357baa02..bd759b5bb7 100644
--- ./stdio-common/tst-printf-format-short.sh
+++ ./stdio-common/tst-printf-format-short.sh
@@ -23,7 +23,7 @@ xprintf=$1; shift
 common_objpfx=$1; shift
 test_program_prefix=$1; shift
 
-AWK=${AWK:-awk}
+AWK="LC_ALL=C ${AWK:-awk}"
 
 status=0
 
diff --git ./stdio-common/tst-printf-format-uchar.sh ./stdio-common/tst-printf-format-uchar.sh
index 08a6914b88..6f41009ad3 100644
--- ./stdio-common/tst-printf-format-uchar.sh
+++ ./stdio-common/tst-printf-format-uchar.sh
@@ -23,7 +23,7 @@ xprintf=$1; shift
 common_objpfx=$1; shift
 test_program_prefix=$1; shift
 
-AWK=${AWK:-awk}
+AWK="LC_ALL=C ${AWK:-awk}"
 
 status=0
 
diff --git ./stdio-common/tst-printf-format-uint.sh ./stdio-common/tst-printf-format-uint.sh
index 0ba203ccda..be2da0064b 100644
--- ./stdio-common/tst-printf-format-uint.sh
+++ ./stdio-common/tst-printf-format-uint.sh
@@ -23,7 +23,7 @@ xprintf=$1; shift
 common_objpfx=$1; shift
 test_program_prefix=$1; shift
 
-AWK=${AWK:-awk}
+AWK="LC_ALL=C ${AWK:-awk}"
 
 status=77
 
diff --git ./stdio-common/tst-printf-format-ullong.sh ./stdio-common/tst-printf-format-ullong.sh
index 5b881ab924..45dfafb682 100644
--- ./stdio-common/tst-printf-format-ullong.sh
+++ ./stdio-common/tst-printf-format-ullong.sh
@@ -23,7 +23,7 @@ xprintf=$1; shift
 common_objpfx=$1; shift
 test_program_prefix=$1; shift
 
-AWK=${AWK:-awk}
+AWK="LC_ALL=C ${AWK:-awk}"
 
 status=77
 
diff --git ./stdio-common/tst-printf-format-ulong.sh ./stdio-common/tst-printf-format-ulong.sh
index f6aeb8e3c0..24e36cbccf 100644
--- ./stdio-common/tst-printf-format-ulong.sh
+++ ./stdio-common/tst-printf-format-ulong.sh
@@ -23,7 +23,7 @@ xprintf=$1; shift
 common_objpfx=$1; shift
 test_program_prefix=$1; shift
 
-AWK=${AWK:-awk}
+AWK="LC_ALL=C ${AWK:-awk}"
 
 status=77
 
diff --git ./stdio-common/tst-printf-format-ushort.sh ./stdio-common/tst-printf-format-ushort.sh
index 07609128ab..0e1008c75e 100644
--- ./stdio-common/tst-printf-format-ushort.sh
+++ ./stdio-common/tst-printf-format-ushort.sh
@@ -23,7 +23,7 @@ xprintf=$1; shift
 common_objpfx=$1; shift
 test_program_prefix=$1; shift
 
-AWK=${AWK:-awk}
+AWK="LC_ALL=C ${AWK:-awk}"
 
 status=0
 
-- 
2.54.0